CSS Working Group Editor Drafts

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WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-scope', 'number': '1', 'text': 'Scope', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-conformance', 'number': '2', 'text': 'Conformance', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-references', 'number': '3', 'text': 'References', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-references-normative', 'number': '3.1', 'text': 'Normative References', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-references-informative', 'number': '3.2', 'text': 'Informative References', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-notational-conventions', 'number': '4', 'text': 'Notational Conventions', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-algorithm-conventions', 'number': '4.1', 'text': 'Algorithm Conventions', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-implicit-completions', 'number': '4.1.1', 'text': 'Implicit Completions', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#example-get-the-answer', 'number': '4.1.1.1', 'text': 'GetTheAnswer ( input )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#example-get-the-answer-2', 'number': '4.1.1.2', 'text': 'GetTheAnswer2 ( input )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-optional-errors', 'number': '4.1.2', 'text': 'Optional Errors', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-terms-and-definitions', 'number': '5', 'text': 'Terms and Definitions', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-json-values-utilities', 'number': '6', 'text': 'JSON values utilities', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-ParseJSON', 'number': '6.1', 'text': 'ParseJSON ( string )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-JSONObjectGet', 'number': '6.2', 'text': 'JSONObjectGet ( object, key )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-JSONArrayIterate', 'number': '6.3', 'text': 'JSONArrayIterate ( array )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-StringSplit', 'number': '6.4', 'text': 'StringSplit ( string, separators )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-source-map-format', 'number': '7', 'text': 'Source map format', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-decoding-source-maps', 'number': '7.1', 'text': 'Decoding source maps', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-ParseSourceMap', 'number': '7.1.1', 'text': 'ParseSourceMap ( string, baseURL )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-DecodeSourceMap', 'number': '7.1.2', 'text': 'DecodeSourceMap ( json, baseURL )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-GetOptionalString', 'number': '7.1.2.1', 'text': 'GetOptionalString ( object, key )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-GetOptionalListOfStrings', 'number': '7.1.2.2', 'text': 'GetOptionalListOfStrings ( object, key )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-GetOptionalListOfOptionalStrings', 'number': '7.1.2.3', 'text': 'GetOptionalListOfOptionalStrings ( object, key )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-GetOptionalListOfArrayIndexes', 'number': '7.1.2.4', 'text': 'GetOptionalListOfArrayIndexes ( object, key )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-mappings', 'number': '7.2', 'text': 'Mappings structure', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-DecodeMappings', 'number': '7.2.1', 'text': 'DecodeMappings ( mappings, names, sources )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-ValidateBase64VLQGroupings', 'number': '7.2.1.1', 'text': 'ValidateBase64VLQGroupings ( groupings )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-DecodeBase64VLQ', 'number': '7.2.1.2', 'text': 'DecodeBase64VLQ ( segment, position )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#ConsumeBase64ValueAt', 'number': '7.2.1.2.1', 'text': 'ConsumeBase64ValueAt ( string, position )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-mappings-for-generated-javascript-code', 'number': '7.2.2', 'text': 'Mappings for generated JavaScript code', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-names-for-generated-javascript-code', 'number': '7.2.3', 'text': 'Names for generated JavaScript code', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-sources', 'number': '7.3', 'text': 'Resolving sources', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-DecodeSourceMapSources', 'number': '7.3.1', 'text': 'DecodeSourceMapSources ( baseURL, sourceRoot, sources, sourcesContent, ignoreList )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-extensions', 'number': '7.4', 'text': 'Extensions', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-index-source-map', 'number': '8', 'text': 'Index source map', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-DecodeIndexSourceMap', 'number': '8.1', 'text': 'DecodeIndexSourceMap ( json, baseURL )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-GeneratedPositionLessThan', 'number': '8.1.1', 'text': 'GeneratedPositionLessThan ( a, b )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-retrieving-source-maps', 'number': '9', 'text': 'Retrieving source maps', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-linking-generated-code', 'number': '9.1', 'text': 'Linking generated code to source maps', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-linking-http-header', 'number': '9.1.1', 'text': 'Linking through HTTP headers', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-linking-inline', 'number': '9.1.2', 'text': 'Linking through inline annotations', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-JavaScriptExtractSourceMapURL', 'number': '9.1.2.1', 'text': 'JavaScriptExtractSourceMapURL ( source )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-MatchSourceMapURL', 'number': '9.1.2.1.1', 'text': 'MatchSourceMapURL ( comment )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-CSSExtractSourceMapURL', 'number': '9.1.2.2', 'text': 'CSSExtractSourceMapURL ( source )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-WebAssemblyExtractSourceMapURL', 'number': '9.1.2.3', 'text': 'WebAssemblyExtractSourceMapURL ( bytes )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-fetching-source-maps', 'number': '9.2', 'text': 'Fetching source maps', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://tc39.es/source-map/>.
{'url': 'https://tc39.es/ecma426/#sec-FetchSourceMap', 'number': '9.2.1', 'text': 'FetchSourceMap ( url )', 'spec': 'Source Map'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#q1.0', 'number': '1', 'text': 'About the CSS 2.1 Specification', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#css2.1-v-css2', 'number': '1.1', 'text': 'CSS 2.1 vs CSS 2', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#reading', 'number': '1.2', 'text': 'Reading the specification', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#organization', 'number': '1.3', 'text': 'How the specification is organized', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#conventions', 'number': '1.4', 'text': 'Conventions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#doc-language', 'number': '1.4.1', 'text': 'Document language elements and attributes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#property-defs', 'number': '1.4.2', 'text': 'CSS property definitions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#value-defs', 'number': '1.4.2.1', 'text': 'Value', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#initial-value', 'number': '1.4.2.2', 'text': 'Initial', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#applies-to', 'number': '1.4.2.3', 'text': 'Applies to', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#inherited-prop', 'number': '1.4.2.4', 'text': 'Inherited', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#percentage-wrt', 'number': '1.4.2.5', 'text': 'Percentage values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#media-applies', 'number': '1.4.2.6', 'text': 'Media groups', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#computed-defs', 'number': '1.4.2.7', 'text': 'Computed value', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#shorthand', 'number': '1.4.3', 'text': 'Shorthand properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#notes-and-examples', 'number': '1.4.4', 'text': 'Notes and examples', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#images-and-longdesc', 'number': '1.4.5', 'text': 'Images and long descriptions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/about.html#acknowledgements', 'number': '1.5', 'text': 'Acknowledgments', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/intro.html#q2.0', 'number': '2', 'text': 'Introduction to CSS 2.1', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/intro.html#html-tutorial', 'number': '2.1', 'text': 'A brief CSS 2.1 tutorial for HTML', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/intro.html#xml-tutorial', 'number': '2.2', 'text': 'A brief CSS 2.1 tutorial for XML', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/intro.html#processing-model', 'number': '2.3', 'text': 'The CSS 2.1 processing model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/intro.html#the-canvas', 'number': '2.3.1', 'text': 'The canvas', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/intro.html#addressing', 'number': '2.3.2', 'text': 'CSS 2.1 addressing model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/intro.html#design-principles', 'number': '2.4', 'text': 'CSS design principles', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/conform.html#q3.0', 'number': '3', 'text': 'Conformance: Requirements and Recommendations', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/conform.html#defs', 'number': '3.1', 'text': 'Definitions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/conform.html#conformance', 'number': '3.2', 'text': 'UA Conformance', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/conform.html#errors', 'number': '3.3', 'text': 'Error conditions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#q4.0', 'number': '4', 'text': 'Syntax and basic data types', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#syntax', 'number': '4.1', 'text': 'Syntax', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#tokenization', 'number': '4.1.1', 'text': 'Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#keywords', 'number': '4.1.2', 'text': 'Keywords', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#vendor-keywords', 'number': '4.1.2.1', 'text': 'Vendor-specific extensions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#vendor-keyword-history', 'number': '4.1.2.2', 'text': 'Informative Historical Notes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#characters', 'number': '4.1.3', 'text': 'Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#statements', 'number': '4.1.4', 'text': 'Statements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#block', 'number': '4.1.6', 'text': 'Blocks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#rule-sets', 'number': '4.1.7', 'text': 'Rule sets, declaration blocks, and selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#declaration', 'number': '4.1.8', 'text': 'Declarations and properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#comments', 'number': '4.1.9', 'text': 'Comments', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#parsing-errors', 'number': '4.2', 'text': 'Rules for handling parsing errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#values', 'number': '4.3', 'text': 'Values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#numbers', 'number': '4.3.1', 'text': 'Integers and real numbers', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#length-units', 'number': '4.3.2', 'text': 'Lengths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#percentage-units', 'number': '4.3.3', 'text': 'Percentages', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#uri', 'number': '4.3.4', 'text': 'URLs and URIs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#counter', 'number': '4.3.5', 'text': 'Counters', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#color-units', 'number': '4.3.6', 'text': 'Colors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#strings', 'number': '4.3.7', 'text': 'Strings', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#unsupported-values', 'number': '4.3.8', 'text': 'Unsupported Values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#charset', 'number': '4.4', 'text': 'CSS style sheet representation', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/syndata.html#escaping', 'number': '4.4.1', 'text': 'Referring to characters not represented in a character encoding', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#q5.0', 'number': '5', 'text': 'Selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#pattern-matching', 'number': '5.1', 'text': 'Pattern matching', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#selector-syntax', 'number': '5.2', 'text': 'Selector syntax', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#grouping', 'number': '5.2.1', 'text': 'Grouping', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#universal-selector', 'number': '5.3', 'text': 'Universal selector', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#type-selectors', 'number': '5.4', 'text': 'Type selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#descendant-selectors', 'number': '5.5', 'text': 'Descendant selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#child-selectors', 'number': '5.6', 'text': 'Child selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#adjacent-selectors', 'number': '5.7', 'text': 'Adjacent sibling selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#attribute-selectors', 'number': '5.8', 'text': 'Attribute selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#matching-attrs', 'number': '5.8.1', 'text': 'Matching attributes and attribute values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#default-attrs', 'number': '5.8.2', 'text': 'Default attribute values in DTDs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#class-html', 'number': '5.8.3', 'text': 'Class selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#id-selectors', 'number': '5.9', 'text': 'ID selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#pseudo-elements', 'number': '5.10', 'text': 'Pseudo-elements and pseudo-classes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#pseudo-class-selectors', 'number': '5.11', 'text': 'Pseudo-classes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#first-child', 'number': '5.11.1', 'text': ':first-child pseudo-class', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#link-pseudo-classes', 'number': '5.11.2', 'text': 'The link pseudo-classes: :link and :visited', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#dynamic-pseudo-classes', 'number': '5.11.3', 'text': 'The dynamic pseudo-classes: :hover, :active, and :focus', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#lang', 'number': '5.11.4', 'text': 'The language pseudo-class: :lang', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#pseudo-element-selectors', 'number': '5.12', 'text': 'Pseudo-elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#first-letter', 'number': '5.12.2', 'text': 'The :first-letter pseudo-element', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/selector.html#before-and-after', 'number': '5.12.3', 'text': 'The :before and :after pseudo-elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#q6.0', 'number': '6', 'text': 'Assigning property values, Cascading, and Inheritance', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#value-stages', 'number': '6.1', 'text': 'Specified, computed, and actual values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#inheritance', 'number': '6.2', 'text': 'Inheritance', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#at-import', 'number': '6.3', 'text': 'The @import rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#cascade', 'number': '6.4', 'text': 'The cascade', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#cascading-order', 'number': '6.4.1', 'text': 'Cascading order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#important-rules', 'number': '6.4.2', 'text': '!important rules', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#specificity', 'number': '6.4.3', 'text': "Calculating a selector's specificity", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/cascade.html#preshint', 'number': '6.4.4', 'text': 'Precedence of non-CSS presentational hints', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/media.html#q7.0', 'number': '7', 'text': 'Media types', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/media.html#media-intro', 'number': '7.1', 'text': 'Introduction to media types', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/media.html#media-sheets', 'number': '7.2', 'text': 'Specifying media-dependent style sheets', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/media.html#at-media-rule', 'number': '7.2.1', 'text': 'The @media rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/media.html#media-types', 'number': '7.3', 'text': 'Recognized media types', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/media.html#media-groups', 'number': '7.3.1', 'text': 'Media groups', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#box-model', 'number': '8', 'text': 'Box model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#box-dimensions', 'number': '8.1', 'text': 'Box dimensions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#mpb-examples', 'number': '8.2', 'text': 'Example of margins, padding, and borders', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#margin-properties', 'number': '8.3', 'text': "Margin properties: 'margin-top', 'margin-right', 'margin-bottom', 'margin-left', and 'margin'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#collapsing-margins', 'number': '8.3.1', 'text': 'Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#padding-properties', 'number': '8.4', 'text': "Padding properties: 'padding-top', 'padding-right', 'padding-bottom', 'padding-left', and 'padding'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#border-properties', 'number': '8.5', 'text': 'Border properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#border-width-properties', 'number': '8.5.1', 'text': "Border width: 'border-top-width', 'border-right-width', 'border-bottom-width', 'border-left-width', and 'border-width'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#border-color-properties', 'number': '8.5.2', 'text': "Border color: 'border-top-color', 'border-right-color', 'border-bottom-color', 'border-left-color', and 'border-color'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#border-style-properties', 'number': '8.5.3', 'text': "Border style: 'border-top-style', 'border-right-style', 'border-bottom-style', 'border-left-style', and 'border-style'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#border-shorthand-properties', 'number': '8.5.4', 'text': "Border shorthand properties: 'border-top', 'border-right', 'border-bottom', 'border-left', and 'border'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/box.html#bidi-box-model', 'number': '8.6', 'text': 'The box model for inline elements in bidirectional context', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#q9.0', 'number': '9', 'text': 'Visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#visual-model-intro', 'number': '9.1', 'text': 'Introduction to the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#viewport', 'number': '9.1.1', 'text': 'The viewport', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#box-gen', 'number': '9.2', 'text': 'Controlling box generation', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#block-boxes', 'number': '9.2.1', 'text': 'Block-level elements and block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#anonymous-block-level', 'number': '9.2.1.1', 'text': 'Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#inline-boxes', 'number': '9.2.2', 'text': 'Inline-level elements and inline boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#anonymous', 'number': '9.2.2.1', 'text': 'Anonymous inline boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#run-in', 'number': '9.2.3', 'text': 'Run-in boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#display-prop', 'number': '9.2.4', 'text': "The 'display' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#positioning-scheme', 'number': '9.3', 'text': 'Positioning schemes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#choose-position', 'number': '9.3.1', 'text': "Choosing a positioning scheme: 'position' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#position-props', 'number': '9.3.2', 'text': "Box offsets: 'top', 'right', 'bottom', 'left'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#normal-flow', 'number': '9.4', 'text': 'Normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#block-formatting', 'number': '9.4.1', 'text': 'Block formatting contexts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#inline-formatting', 'number': '9.4.2', 'text': 'Inline formatting contexts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#relative-positioning', 'number': '9.4.3', 'text': 'Relative positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#floats', 'number': '9.5', 'text': 'Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#float-position', 'number': '9.5.1', 'text': "Positioning the float: the 'float' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#flow-control', 'number': '9.5.2', 'text': "Controlling flow next to floats: the 'clear' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#absolute-positioning', 'number': '9.6', 'text': 'Absolute positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#fixed-positioning', 'number': '9.6.1', 'text': 'Fixed positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#dis-pos-flo', 'number': '9.7', 'text': "Relationships between 'display', 'position', and 'float'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#comparison', 'number': '9.8', 'text': 'Comparison of normal flow, floats, and absolute positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#comp-normal-flow', 'number': '9.8.1', 'text': 'Normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#comp-relpos', 'number': '9.8.2', 'text': 'Relative positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#comp-float', 'number': '9.8.3', 'text': 'Floating a box', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#comp-abspos', 'number': '9.8.4', 'text': 'Absolute positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#layers', 'number': '9.9', 'text': 'Layered presentation', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#z-index', 'number': '9.9.1', 'text': "Specifying the stack level: the 'z-index' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visuren.html#direction', 'number': '9.10', 'text': "Text direction: the 'direction' and 'unicode-bidi' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#q10.0', 'number': '', 'text': '10 Visual formatting model details', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#containing-block-details', 'number': '10.1', 'text': 'Definition of "containing block"', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#the-width-property', 'number': '10.2', 'text': "Content width: the 'width' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#Computing_widths_and_margins', 'number': '10.3', 'text': 'Calculating widths and margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#inline-width', 'number': '10.3.1', 'text': 'Inline, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#inline-replaced-width', 'number': '10.3.2', 'text': 'Inline, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#blockwidth', 'number': '10.3.3', 'text': 'Block-level, non-replaced elements in normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#block-replaced-width', 'number': '10.3.4', 'text': 'Block-level, replaced elements in normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#float-width', 'number': '10.3.5', 'text': 'Floating, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#float-replaced-width', 'number': '10.3.6', 'text': 'Floating, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-width', 'number': '10.3.7', 'text': 'Absolutely positioned, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#abs-replaced-width', 'number': '10.3.8', 'text': 'Absolutely positioned, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#inlineblock-width', 'number': '10.3.9', 'text': "'Inline-block', non-replaced elements in normal flow", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#inlineblock-replaced-width', 'number': '10.3.10', 'text': "'Inline-block', replaced elements in normal flow", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#min-max-widths', 'number': '10.4', 'text': "Minimum and maximum widths: 'min-width' and 'max-width'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#the-height-property', 'number': '10.5', 'text': "Content height: the 'height' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#Computing_heights_and_margins', 'number': '10.6', 'text': 'Calculating heights and margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#inline-non-replaced', 'number': '10.6.1', 'text': 'Inline, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#inline-replaced-height', 'number': '10.6.2', 'text': "Inline replaced elements, block-level replaced elements in normal flow, 'inline-block' replaced elements in normal flow and floating replaced elements", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#normal-block', 'number': '10.6.3', 'text': "Block-level non-replaced elements in normal flow when 'overflow' computes to 'visible'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-height', 'number': '10.6.4', 'text': 'Absolutely positioned, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#abs-replaced-height', 'number': '10.6.5', 'text': 'Absolutely positioned, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#block-root-margin', 'number': '10.6.6', 'text': 'Complicated cases', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#root-height', 'number': '10.6.7', 'text': "'Auto' heights for block formatting context roots", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#min-max-heights', 'number': '10.7', 'text': "Minimum and maximum heights: 'min-height' and 'max-height'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#line-height', 'number': '10.8', 'text': "Line height calculations: the 'line-height' and 'vertical-align' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visudet.html#leading', 'number': '10.8.1', 'text': 'Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visufx.html#q11.0', 'number': '', 'text': '11 Visual effects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visufx.html#overflow-clipping', 'number': '11.1', 'text': 'Overflow and clipping', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visufx.html#overflow', 'number': '11.1.1', 'text': "Overflow: the 'overflow' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visufx.html#clipping', 'number': '11.1.2', 'text': "Clipping: the 'clip' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/visufx.html#visibility', 'number': '11.2', 'text': "Visibility: the 'visibility' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#generated-text', 'number': '', 'text': '12 Generated content, automatic numbering, and lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#before-after-content', 'number': '12.1', 'text': 'The :before and :after pseudo-elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#content', 'number': '12.2', 'text': "The 'content' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#quotes', 'number': '12.3', 'text': 'Quotation marks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#quotes-specify', 'number': '12.3.1', 'text': "Specifying quotes with the 'quotes' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#quotes-insert', 'number': '12.3.2', 'text': "Inserting quotes with the 'content' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#scope', 'number': '12.4.1', 'text': 'Nested counters and scope', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#counter-styles', 'number': '12.4.2', 'text': 'Counter styles', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#undisplayed-counters', 'number': '12.4.3', 'text': "Counters in elements with 'display: none'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#lists', 'number': '12.5', 'text': 'Lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/generate.html#list-style', 'number': '12.5.1', 'text': "Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#the-page', 'number': '', 'text': '13 Paged media', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#page-intro', 'number': '13.1', 'text': 'Introduction to paged media', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#page-box', 'number': '13.2', 'text': 'Page boxes: the @page rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#page-margins', 'number': '13.2.1', 'text': 'Page margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#page-selectors', 'number': '13.2.2', 'text': 'Page selectors: selecting left, right, and first pages', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#outside-page-box', 'number': '13.2.3', 'text': 'Content outside the page box', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#page-breaks', 'number': '13.3', 'text': 'Page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#page-break-props', 'number': '13.3.1', 'text': "Page break properties: 'page-break-before', 'page-break-after', 'page-break-inside'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#break-inside', 'number': '13.3.2', 'text': "Breaks inside elements: 'orphans', 'widows'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#allowed-page-breaks', 'number': '13.3.3', 'text': 'Allowed page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#forced', 'number': '13.3.4', 'text': 'Forced page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#best-page-breaks', 'number': '13.3.5', 'text': '"Best" page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/page.html#page-cascade', 'number': '13.4', 'text': 'Cascading in the page context', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/colors.html#q14.0', 'number': '', 'text': '14 Colors and Backgrounds', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/colors.html#colors', 'number': '14.1', 'text': "Foreground color: the 'color' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/colors.html#background', 'number': '14.2', 'text': 'The background', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/colors.html#background-properties', 'number': '14.2.1', 'text': "Background properties: 'background-color', 'background-image', 'background-repeat', 'background-attachment', 'background-position', and 'background'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#q15.0', 'number': '', 'text': '15 Fonts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#fonts-intro', 'number': '15.1', 'text': 'Introduction', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#algorithm', 'number': '15.2', 'text': 'Font matching algorithm', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#font-family-prop', 'number': '15.3', 'text': "Font family: the 'font-family' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#generic-font-families', 'number': '15.3.1', 'text': 'Generic font families', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#font-styling', 'number': '15.4', 'text': "Font styling: the 'font-style' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#small-caps', 'number': '15.5', 'text': "Small-caps: the 'font-variant' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#font-boldness', 'number': '15.6', 'text': "Font boldness: the 'font-weight' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#font-size-props', 'number': '15.7', 'text': "Font size: the 'font-size' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/fonts.html#font-shorthand', 'number': '15.8', 'text': "Shorthand font property: the 'font' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#q16.0', 'number': '', 'text': '16 Text', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#indentation-prop', 'number': '16.1', 'text': "Indentation: the 'text-indent' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#alignment-prop', 'number': '16.2', 'text': "Alignment: the 'text-align' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#decoration', 'number': '16.3', 'text': 'Decoration', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#lining-striking-props', 'number': '16.3.1', 'text': "Underlining, overlining, striking, and blinking: the 'text-decoration' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#spacing-props', 'number': '16.4', 'text': "Letter and word spacing: the 'letter-spacing' and 'word-spacing' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#caps-prop', 'number': '16.5', 'text': "Capitalization: the 'text-transform' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#white-space-prop', 'number': '16.6', 'text': "White space: the 'white-space' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#white-space-model', 'number': '16.6.1', 'text': "The 'white-space' processing model", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#egbidiwscollapse', 'number': '16.6.2', 'text': 'Example of bidirectionality with white space collapsing', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/text.html#ctrlchars', 'number': '16.6.3', 'text': "Control and combining characters' details", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#q17.0', 'number': '', 'text': '17 Tables', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#tables-intro', 'number': '17.1', 'text': 'Introduction to tables', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#table-display', 'number': '17.2', 'text': 'The CSS table model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#anonymous-boxes', 'number': '17.2.1', 'text': 'Anonymous table objects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#columns', 'number': '17.3', 'text': 'Columns', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#model', 'number': '17.4', 'text': 'Tables in the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#caption-position', 'number': '17.4.1', 'text': 'Caption position and alignment', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#table-layout', 'number': '17.5', 'text': 'Visual layout of table contents', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#table-layers', 'number': '17.5.1', 'text': 'Table layers and transparency', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#width-layout', 'number': '17.5.2', 'text': "Table width algorithms: the 'table-layout' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#fixed-table-layout', 'number': '17.5.2.1', 'text': 'Fixed table layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#auto-table-layout', 'number': '17.5.2.2', 'text': 'Automatic table layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#height-layout', 'number': '17.5.3', 'text': 'Table height algorithms', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#column-alignment', 'number': '17.5.4', 'text': 'Horizontal alignment in a column', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#dynamic-effects', 'number': '17.5.5', 'text': 'Dynamic row and column effects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#borders', 'number': '17.6', 'text': 'Borders', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#separated-borders', 'number': '17.6.1', 'text': 'The separated borders model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#empty-cells', 'number': '17.6.1.1', 'text': "Borders and Backgrounds around empty cells: the 'empty-cells' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#collapsing-borders', 'number': '17.6.2', 'text': 'The collapsing border model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#border-conflict-resolution', 'number': '17.6.2.1', 'text': 'Border conflict resolution', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/tables.html#table-border-styles', 'number': '17.6.3', 'text': 'Border styles', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/ui.html#q18.0', 'number': '', 'text': '18 User interface', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/ui.html#cursor-props', 'number': '18.1', 'text': "Cursors: the 'cursor' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/ui.html#system-colors', 'number': '18.2', 'text': 'System Colors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/ui.html#system-fonts', 'number': '18.3', 'text': 'User preferences for fonts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/ui.html#dynamic-outlines', 'number': '18.4', 'text': "Dynamic outlines: the 'outline' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/ui.html#outline-focus', 'number': '18.4.1', 'text': 'Outlines and the focus', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/ui.html#magnification', 'number': '18.5', 'text': 'Magnification', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#q19.0', 'number': 'A', 'text': 'Aural style sheets', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#aural-media-group', 'number': 'A.1', 'text': "The media types 'aural' and 'speech'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#aural-intro', 'number': 'A.2', 'text': 'Introduction to aural style sheets', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#angles', 'number': 'A.2.1', 'text': 'Angles', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#times', 'number': 'A.2.2', 'text': 'Times', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#frequencies', 'number': 'A.2.3', 'text': 'Frequencies', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#volume-props', 'number': 'A.3', 'text': "Volume properties: 'volume'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#speaking-props', 'number': 'A.4', 'text': "Speaking properties: 'speak'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#pause-props', 'number': 'A.5', 'text': "Pause properties: 'pause-before', 'pause-after', and 'pause'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#cue-props', 'number': 'A.6', 'text': "Cue properties: 'cue-before', 'cue-after', and 'cue'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#mixing-props', 'number': 'A.7', 'text': "Mixing properties: 'play-during'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#spatial-props', 'number': 'A.8', 'text': "Spatial properties: 'azimuth' and 'elevation'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#voice-char-props', 'number': 'A.9', 'text': "Voice characteristic properties: 'speech-rate', 'voice-family', 'pitch', 'pitch-range', 'stress', and 'richness'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#speech-props', 'number': 'A.10', 'text': "Speech properties: 'speak-punctuation' and 'speak-numeral'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#aural-tables', 'number': 'A.11', 'text': 'Audio rendering of tables', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#speak-headers', 'number': 'A.11.1', 'text': "Speaking headers: the 'speak-header' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#sample', 'number': 'A.12', 'text': 'Sample style sheet for HTML', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/aural.html#Emacspeak', 'number': 'A.13', 'text': 'Emacspeak', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/refs.html#q20.0', 'number': 'B', 'text': 'Bibliography', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/refs.html#normative', 'number': 'B.1', 'text': 'Normative references', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/refs.html#informative', 'number': 'B.2', 'text': 'Informative references', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#q21.0', 'number': 'C', 'text': 'Changes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#new', 'number': 'C.1', 'text': 'Additional property values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#a4.3.6', 'number': 'C.1.1', 'text': 'Section 4.3.6 Colors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#a9.2.4', 'number': 'C.1.2', 'text': "Section 9.2.4 The 'display' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#a12.2', 'number': 'C.1.3', 'text': "Section 12.2 The 'content' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#a16.6', 'number': 'C.1.4', 'text': "Section 16.6 White space: the 'white-space' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#a18.1', 'number': 'C.1.5', 'text': "Section 18.1 Cursors: the 'cursor' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#changes', 'number': 'C.2', 'text': 'Changes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c1.1', 'number': 'C.2.1', 'text': 'Section 1.1 CSS 2.1 vs CSS 2', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c1.2', 'number': 'C.2.2', 'text': 'Section 1.2 Reading the specification', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c1.3', 'number': 'C.2.3', 'text': 'Section 1.3 How the specification is organized', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c1.4.2.1', 'number': 'C.2.4', 'text': 'Section 1.4.2.1 Value', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c1.4.2.6', 'number': 'C.2.5', 'text': 'Section 1.4.2.6 Media groups', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c1.4.2.7', 'number': 'C.2.6', 'text': 'Section 1.4.2.7 Computed value', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c1.4.4', 'number': 'C.2.7', 'text': 'Section 1.4.4 Notes and examples', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c1.5', 'number': 'C.2.8', 'text': 'Section 1.5 Acknowledgments', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c3.2', 'number': 'C.2.9', 'text': 'Section 3.2 Conformance', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c3.3', 'number': 'C.2.10', 'text': 'Section 3.3 Error Conditions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.1.1', 'number': 'C.2.11', 'text': 'Section 4.1.1 Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.1.3', 'number': 'C.2.12', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.2', 'number': 'C.2.13', 'text': 'Section 4.2 Rules for handling parsing errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.3', 'number': 'C.2.14', 'text': 'Section 4.3 Values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.3.2', 'number': 'C.2.15', 'text': 'Section 4.3.2 Lengths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.3.4', 'number': 'C.2.16', 'text': 'Section 4.3.4 URLs and URIs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.3.5', 'number': 'C.2.17', 'text': 'Section 4.3.5 Counters', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.3.6', 'number': 'C.2.18', 'text': 'Section 4.3.6 Colors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.3.8', 'number': 'C.2.19', 'text': 'Section 4.3.8 Unsupported Values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c4.4', 'number': 'C.2.20', 'text': 'Section 4.4 CSS style sheet representation', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c5.8.1', 'number': 'C.2.21', 'text': 'Section 5.8.1 Matching attributes and attribute values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c5.8.3', 'number': 'C.2.22', 'text': 'Section 5.8.3 Class selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c5.9', 'number': 'C.2.23', 'text': 'Section 5.9 ID selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c5.10', 'number': 'C.2.24', 'text': 'Section 5.10 Pseudo-elements and pseudo-classes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c5.11.2', 'number': 'C.2.25', 'text': 'Section 5.11.2 The link pseudo-classes: :link and :visited', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c5.11.4', 'number': 'C.2.26', 'text': 'Section 5.11.4 The language pseudo-class: :lang', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c5.12.1', 'number': 'C.2.27', 'text': 'Section 5.12.1 The :first-line pseudo-element', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c5.12.2', 'number': 'C.2.28', 'text': 'Section 5.12.2 The :first-letter pseudo-element', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c6.1', 'number': 'C.2.29', 'text': 'Section 6.1 Specified, computed, and actual values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c6.4.1', 'number': 'C.2.30', 'text': 'Section 6.4.1 Cascading order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c6.4.3', 'number': 'C.2.31', 'text': "Section 6.4.3 Calculating a selector's specificity", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c6.4.4', 'number': 'C.2.32', 'text': 'Section 6.4.4 Precedence of non-CSS presentational hints', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c7.3', 'number': 'C.2.33', 'text': 'Section 7.3 Recognized Media Types', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c7.3.1', 'number': 'C.2.34', 'text': 'Section 7.3.1 Media Groups', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c8.3', 'number': 'C.2.35', 'text': 'Section 8.3 Margin properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c8.3.1', 'number': 'C.2.36', 'text': 'Section 8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c8.4', 'number': 'C.2.37', 'text': 'Section 8.4 Padding properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c8.5.2', 'number': 'C.2.38', 'text': 'Section 8.5.2 Border color', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c8.5.3', 'number': 'C.2.39', 'text': 'Section 8.5.3 Border style', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c8.6', 'number': 'C.2.40', 'text': 'Section 8.6 The box model for inline elements in bidirectional context', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.1.2', 'number': 'C.2.41', 'text': 'Section 9.1.2 Containing blocks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.2.1.1', 'number': 'C.2.42', 'text': 'Section 9.2.1.1 Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.2.2.1', 'number': 'C.2.43', 'text': 'Section 9.2.2.1 Anonymous inline boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.2.3', 'number': 'C.2.44', 'text': 'Section 9.2.3 Run-in boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.2.4', 'number': 'C.2.45', 'text': "Section 9.2.4 The 'display' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.3.1', 'number': 'C.2.46', 'text': 'Section 9.3.1 Choosing a positioning scheme', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.3.2', 'number': 'C.2.47', 'text': 'Section 9.3.2 Box offsets', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.4.1', 'number': 'C.2.48', 'text': 'Section 9.4.1 Block formatting contexts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.4.2', 'number': 'C.2.49', 'text': 'Section 9.4.2 Inline formatting context', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.4.3', 'number': 'C.2.50', 'text': 'Section 9.4.3 Relative positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.5', 'number': 'C.2.51', 'text': 'Section 9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.5.1', 'number': 'C.2.52', 'text': 'Section 9.5.1 Positioning the float', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.5.2', 'number': 'C.2.53', 'text': 'Section 9.5.2 Controlling flow next to floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.7', 'number': 'C.2.54', 'text': "Section 9.7 Relationships between 'display', 'position', and 'float'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.9', 'number': 'C.2.55', 'text': 'Section 9.9 Layered presentation', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c9.10', 'number': 'C.2.56', 'text': 'Section 9.10 Text direction', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10', 'number': 'C.2.57', 'text': 'Chapter 10 Visual formatting model details', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.1', 'number': 'C.2.58', 'text': 'Section 10.1 Definition of "containing block"', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.2', 'number': 'C.2.59', 'text': 'Section 10.2 Content width', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.3', 'number': 'C.2.60', 'text': 'Section 10.3 Calculating widths and margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.3.2', 'number': 'C.2.61', 'text': 'Section 10.3.2 Inline, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.3.3', 'number': 'C.2.62', 'text': 'Section 10.3.3 Block-level, non-replaced elements in normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.3.4', 'number': 'C.2.63', 'text': 'Section 10.3.4 Block-level, replaced elements in normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.3.5', 'number': 'C.2.64', 'text': 'Section 10.3.5 Floating, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.3.6', 'number': 'C.2.65', 'text': 'Section 10.3.6 Floating, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.3.7', 'number': 'C.2.66', 'text': 'Section 10.3.7 Absolutely positioned, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.3.8', 'number': 'C.2.67', 'text': 'Section 10.3.8 Absolutely positioned, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.4', 'number': 'C.2.68', 'text': 'Section 10.4 Minimum and maximum widths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.5', 'number': 'C.2.69', 'text': 'Section 10.5 Content height', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.6', 'number': 'C.2.70', 'text': 'Section 10.6 Calculating heights and margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.6.1', 'number': 'C.2.71', 'text': 'Section 10.6.1 Inline, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.6.2', 'number': 'C.2.72', 'text': "Section 10.6.2 Inline replaced elements, block-level replaced elements in normal flow, 'inline-block' replaced elements in normal flow and floating replaced elements", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.6.3', 'number': 'C.2.73', 'text': "Section 10.6.3 Block-level non-replaced elements in normal flow when 'overflow' computes to 'visible'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.6.4', 'number': 'C.2.74', 'text': 'Section 10.6.4 Absolutely positioned, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.6.5', 'number': 'C.2.75', 'text': 'Section 10.6.5 Absolutely positioned, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.7', 'number': 'C.2.76', 'text': 'Section 10.7 Minimum and maximum heights', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.8', 'number': 'C.2.77', 'text': 'Section 10.8 Line height calculations', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c10.8.1', 'number': 'C.2.78', 'text': 'Section 10.8.1 Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c11.1', 'number': 'C.2.79', 'text': 'Section 11.1 Overflow and clipping', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c11.1.1', 'number': 'C.2.80', 'text': 'Section 11.1.1 Overflow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c11.1.2', 'number': 'C.2.81', 'text': "Section 11.1.2 Clipping: the 'clip' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c11.2', 'number': 'C.2.82', 'text': 'Section 11.2 Visibility', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c12', 'number': 'C.2.83', 'text': 'Chapter 12 Generated content, automatic numbering, and lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c12.1', 'number': 'C.2.84', 'text': 'Section 12.1 The :before and :after pseudo-elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c12.2', 'number': 'C.2.85', 'text': "Section 12.2 The 'content' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c12.3.2', 'number': 'C.2.86', 'text': "Section 12.3.2 Inserting quotes with the 'content' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c12.4', 'number': 'C.2.87', 'text': 'Section 12.4 Automatic counters and numbering', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c12.4.1', 'number': 'C.2.88', 'text': 'Section 12.4.1 Nested counters and scope', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c12.5', 'number': 'C.2.89', 'text': 'Section 12.5 Lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c12.5.1', 'number': 'C.2.90', 'text': 'Section 12.5.1 Lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c13.1', 'number': 'C.2.91', 'text': 'Chapter 13 Paged media', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c13.2.2', 'number': 'C.2.92', 'text': 'Section 13.2.2 Page selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c13.3.1', 'number': 'C.2.93', 'text': 'Section 13.3.1 Page break properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c13.3.3', 'number': 'C.2.94', 'text': 'Section 13.3.3 Allowed page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c14.2.1', 'number': 'C.2.95', 'text': 'Section 14.2.1 Background properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c14.3', 'number': 'C.2.96', 'text': 'Section 14.3 Gamma correction', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c15', 'number': 'C.2.97', 'text': 'Chapter 15 Fonts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c15.2', 'number': 'C.2.98', 'text': 'Section 15.2 Font matching algorithm', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c15.3', 'number': 'C.2.99', 'text': 'Section 15.2.2 Font family', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c15.5', 'number': 'C.2.100', 'text': 'Section 15.5 Small-caps', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c15.6', 'number': 'C.2.101', 'text': 'Section 15.6 Font boldness', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c15.7', 'number': 'C.2.102', 'text': 'Section 15.7 Font size', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c16', 'number': 'C.2.103', 'text': 'Chapter 16 Text', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c16.2', 'number': 'C.2.104', 'text': 'Section 16.2 Alignment', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c16.3.1', 'number': 'C.2.105', 'text': 'Section 16.3.1 Underlining, over lining, striking, and blinking', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c16.4', 'number': 'C.2.106', 'text': 'Section 16.4 Letter and word spacing', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c16.5', 'number': 'C.2.107', 'text': 'Section 16.5 Capitalization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c16.6', 'number': 'C.2.108', 'text': 'Section 16.6 White space', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17', 'number': 'C.2.109', 'text': 'Chapter 17 Tables', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.2', 'number': 'C.2.110', 'text': 'Section 17.2 The CSS table model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.2.1', 'number': 'C.2.111', 'text': 'Section 17.2.1 Anonymous table objects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.4', 'number': 'C.2.112', 'text': 'Section 17.4 Tables in the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.4.1', 'number': 'C.2.113', 'text': 'Section 17.4.1 Caption position and alignment', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.5', 'number': 'C.2.114', 'text': 'Section 17.5 Visual layout of table contents', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.5.1', 'number': 'C.2.115', 'text': 'Section 17.5.1 Table layers and transparency', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.5.2.1', 'number': 'C.2.116', 'text': 'Section 17.5.2.1 Fixed table layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.5.2.2', 'number': 'C.2.117', 'text': 'Section 17.5.2.2 Automatic table layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.5.3', 'number': 'C.2.118', 'text': 'Section 17.5.3 Table height algorithms', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.5.4', 'number': 'C.2.119', 'text': 'Section 17.5.4 Horizontal alignment in a column', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.6', 'number': 'C.2.120', 'text': 'Section 17.6 Borders', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.6.1', 'number': 'C.2.121', 'text': 'Section 17.6.1 The separated borders model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.6.1.1', 'number': 'C.2.122', 'text': 'Section 17.6.1.1 Borders and Backgrounds around empty cells', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.6.2', 'number': 'C.2.123', 'text': 'Section 17.6.2 The collapsing border model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c17.6.2.1', 'number': 'C.2.124', 'text': 'Section 17.6.2.1 Border conflict resolution', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c18.1', 'number': 'C.2.125', 'text': "Section 18.1 Cursors: the 'cursor' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#c18.4', 'number': 'C.2.126', 'text': 'Section 18.4 Dynamic outlines', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s-12', 'number': 'C.2.127', 'text': 'Chapter 12 Generated content, automatic numbering, and lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#cA', 'number': 'C.2.128', 'text': 'Appendix A. Aural style sheets', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#cA.5', 'number': 'C.2.129', 'text': 'Appendix A Section 5 Pause properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#cA.6', 'number': 'C.2.130', 'text': 'Appendix A Section 6 Cue properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#cA.7', 'number': 'C.2.131', 'text': 'Appendix A Section 7 Mixing properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#cB', 'number': 'C.2.132', 'text': 'Appendix B Bibliography', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#other', 'number': 'C.2.133', 'text': 'Other', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#known-errors', 'number': 'C.3', 'text': 'Errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x-shorthand-inherit', 'number': 'C.3.1', 'text': 'Shorthand properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x-applies-table', 'number': 'C.3.2', 'text': 'Applies to', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.1.1', 'number': 'C.3.3', 'text': 'Section 4.1.1 (and G2)', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.1.3', 'number': 'C.3.4', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.3', 'number': 'C.3.5', 'text': 'Section 4.3 (Double sign problem)', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.3.2', 'number': 'C.3.6', 'text': 'Section 4.3.2 Lengths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.3.3', 'number': 'C.3.7', 'text': 'Section 4.3.3 Percentages', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.3.4', 'number': 'C.3.8', 'text': 'Section 4.3.4 URLs and URIs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.3.5', 'number': 'C.3.9', 'text': 'Section 4.3.5 Counters', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.3.6', 'number': 'C.3.10', 'text': 'Section 4.3.6 Colors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x4.3.7', 'number': 'C.3.11', 'text': 'Section 4.3.7 Strings', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x5.10', 'number': 'C.3.12', 'text': 'Section 5.10 Pseudo-elements and pseudo-classes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x6.4', 'number': 'C.3.13', 'text': 'Section 6.4 The cascade', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x8.1', 'number': 'C.3.14', 'text': 'Section 8.1 Box Dimensions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x8.2', 'number': 'C.3.15', 'text': 'Section 8.2 Example of margins, padding, and borders', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x8.5.4', 'number': 'C.3.16', 'text': 'Section 8.5.4 Border shorthand properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.2.1', 'number': 'C.3.17', 'text': 'Section 9.2.1 Block-level elements and block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.3.1', 'number': 'C.3.18', 'text': 'Section 9.3.1 Choosing a positioning scheme', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.3.2', 'number': 'C.3.19', 'text': 'Section 9.3.2 Box offsets', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.4.1', 'number': 'C.3.20', 'text': 'Section 9.4.1 Block formatting contexts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.4.2', 'number': 'C.3.21', 'text': 'Section 9.4.2 Inline formatting context', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.4.3', 'number': 'C.3.22', 'text': 'Section 9.4.3 Relative positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.5', 'number': 'C.3.23', 'text': 'Section 9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.5.1', 'number': 'C.3.24', 'text': 'Section 9.5.1 Positioning the float', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.5.2', 'number': 'C.3.25', 'text': 'Section 9.5.2 Controlling flow next to floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.6', 'number': 'C.3.26', 'text': 'Section 9.6 Absolute positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.7', 'number': 'C.3.27', 'text': "Section 9.7 Relationships between 'display', 'position', and 'float'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x9.10', 'number': 'C.3.28', 'text': 'Section 9.10 Text direction', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x10.1', 'number': 'C.3.29', 'text': 'Section 10.1 Definition of "containing block"', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x10.3.3', 'number': 'C.3.30', 'text': 'Section 10.3.3 Block-level, non-replaced elements in normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x10.4', 'number': 'C.3.31', 'text': 'Section 10.4 Minimum and maximum widths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x10.6.3', 'number': 'C.3.32', 'text': "Section 10.6.3 Block-level non-replaced elements in normal flow when 'overflow' computes to 'visible'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x10.7', 'number': 'C.3.33', 'text': 'Section 10.7 Minimum and maximum heights', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x11.1.1', 'number': 'C.3.34', 'text': 'Section 11.1.1 Overflow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x11.1.2', 'number': 'C.3.35', 'text': "Section 11.1.2 Clipping: the 'clip' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x11.2', 'number': 'C.3.36', 'text': 'Section 11.2 Visibility', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x12.4.2', 'number': 'C.3.37', 'text': 'Section 12.4.2 Counter styles', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x12.6.2', 'number': 'C.3.38', 'text': 'Section 12.6.2 Lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x14.2', 'number': 'C.3.39', 'text': 'Section 14.2 The background', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x14.2.1', 'number': 'C.3.40', 'text': 'Section 14.2.1 Background properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x15.2', 'number': 'C.3.41', 'text': 'Section 15.2 Font matching algorithm', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x15.7', 'number': 'C.3.42', 'text': 'Section 15.7 Font size', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x16.1', 'number': 'C.3.43', 'text': 'Section 16.1 Indentation', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x16.2', 'number': 'C.3.44', 'text': 'Section 16.2 Alignment', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x17.2', 'number': 'C.3.45', 'text': 'Section 17.2 The CSS table model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x17.2.1', 'number': 'C.3.46', 'text': 'Section 17.2.1 Anonymous table objects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x17.4', 'number': 'C.3.47', 'text': 'Section 17.4 Tables in the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x17.5', 'number': 'C.3.48', 'text': 'Section 17.5 Visual layout of table contents', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x17.5.1', 'number': 'C.3.49', 'text': 'Section 17.5.1 Table layers and transparency', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x17.6.1', 'number': 'C.3.50', 'text': 'Section 17.6.1 The separated borders model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#x18.2', 'number': 'C.3.51', 'text': 'Section 18.2 System Colors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#xE.2', 'number': 'C.3.52', 'text': 'Section E.2 Painting order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#clarifications', 'number': 'C.4', 'text': 'Clarifications', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r2.1', 'number': 'C.4.1', 'text': 'Section 2.1 A brief CSS 2.1 tutorial for HTML', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r2.2', 'number': 'C.4.2', 'text': 'Section 2.2 A brief CSS 2.1 tutorial for XML', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r2.3', 'number': 'C.4.3', 'text': 'Section 2.3 The CSS 2.1 processing model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r3.1', 'number': 'C.4.4', 'text': 'Section 3.1 Definitions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r4.1', 'number': 'C.4.5', 'text': 'Section 4.1 Syntax', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r4.1.1', 'number': 'C.4.6', 'text': 'Section 4.1.1 Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r4.1.3', 'number': 'C.4.7', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r4.1.7', 'number': 'C.4.8', 'text': 'Section 4.1.7 Rule sets, declaration blocks, and selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r4.2', 'number': 'C.4.9', 'text': 'Section 4.2 Rules for handling parsing errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r4.3.1', 'number': 'C.4.10', 'text': 'Section 4.3.1 Integers and real numbers', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r4.3.2', 'number': 'C.4.11', 'text': 'Section 4.3.2 Lengths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r4.3.4', 'number': 'C.4.12', 'text': 'Section 4.3.4 URLs and URIs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r5.1', 'number': 'C.4.13', 'text': 'Section 5.1 Pattern matching', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r5.7', 'number': 'C.4.14', 'text': 'Section 5.7 Adjacent sibling selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r5.8.1', 'number': 'C.4.15', 'text': 'Section 5.8.1 Matching attributes and attribute values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r5.8.2', 'number': 'C.4.16', 'text': 'Section 5.8.2 Default attribute values in DTDs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r5.9', 'number': 'C.4.17', 'text': 'Section 5.9 ID selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r5.11.3', 'number': 'C.4.18', 'text': 'Section 5.11.3 The dynamic pseudo-classes: :hover, :active, and :focus', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r5.11.4', 'number': 'C.4.19', 'text': 'Section 5.11.4 The language pseudo-class: :lang', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r5.12.2', 'number': 'C.4.20', 'text': 'Section 5.12.2 The :first-letter pseudo-element', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r6.2', 'number': 'C.4.21', 'text': 'Section 6.2 Inheritance', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r6.2.1', 'number': 'C.4.22', 'text': "Section 6.2.1 The 'inherit' value", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r6.3', 'number': 'C.4.23', 'text': 'Section 6.3 The @import rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r6.4', 'number': 'C.4.24', 'text': 'Section 6.4 The Cascade', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r6.4.1', 'number': 'C.4.25', 'text': 'Section 6.4.1 Cascading order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r6.4.3', 'number': 'C.4.26', 'text': "Section 6.4.3 Calculating a selector's specificity", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r7.2.1', 'number': 'C.4.27', 'text': 'Section 7.2.1 The @media rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r7.3', 'number': 'C.4.28', 'text': 'Section 7.3 Recognized media types', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r7.3.1', 'number': 'C.4.29', 'text': 'Section 7.3.1 Media groups', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r8.1', 'number': 'C.4.30', 'text': 'Section 8.1 Box dimensions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r8.3', 'number': 'C.4.31', 'text': 'Section 8.3 Margin properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r8.3.1', 'number': 'C.4.32', 'text': 'Section 8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r8.5.3', 'number': 'C.4.33', 'text': 'Section 8.5.3 Border style', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.1.1', 'number': 'C.4.34', 'text': 'Section 9.1.1 The viewport', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.2.4', 'number': 'C.4.35', 'text': "Section 9.2.4 The 'display' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.3.1', 'number': 'C.4.36', 'text': 'Section 9.3.1 Choosing a positioning scheme', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.3.2', 'number': 'C.4.37', 'text': 'Section 9.3.2 Box offsets', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.4.2', 'number': 'C.4.38', 'text': 'Section 9.4.2 Inline formatting context', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.4.3', 'number': 'C.4.39', 'text': 'Section 9.4.3 Relative positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.5', 'number': 'C.4.40', 'text': 'Section 9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.5.1', 'number': 'C.4.41', 'text': 'Section 9.5.1 Positioning the float', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.5.2', 'number': 'C.4.42', 'text': 'Section 9.5.2 Controlling flow next to floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r9.8', 'number': 'C.4.43', 'text': 'Section 9.8 Comparison of normal flow, floats, and absolute positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.1', 'number': 'C.4.44', 'text': 'Section 10.1 Definition of "containing block"', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.2', 'number': 'C.4.45', 'text': 'Section 10.2 Content width', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.3.3', 'number': 'C.4.46', 'text': 'Section 10.3.3 Block-level, non-replaced elements in normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.3.8', 'number': 'C.4.47', 'text': 'Section 10.3.8 Absolutely positioning, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.4', 'number': 'C.4.48', 'text': 'Section 10.4 Minimum and maximum widths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.6.1', 'number': 'C.4.49', 'text': 'Section 10.6 Calculating heights and margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.7', 'number': 'C.4.50', 'text': 'Section 10.7 Minimum and maximum heights', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.8', 'number': 'C.4.51', 'text': 'Section 10.8 Line height calculations', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r10.8.1', 'number': 'C.4.52', 'text': 'Section 10.8.1 Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r11.1', 'number': 'C.4.53', 'text': 'Section 11.1 Overflow and clipping', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r11.1.1', 'number': 'C.4.54', 'text': 'Section 11.1.1 Overflow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r11.1.2', 'number': 'C.4.55', 'text': 'Section 11.1.2 Clipping', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r11.2', 'number': 'C.4.56', 'text': 'Section 11.2 Visibility', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r12.1', 'number': 'C.4.57', 'text': 'Section 12.1 The :before and :after pseudo-elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r12.2', 'number': 'C.4.58', 'text': "Section 12.2 The 'content' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r12.3.2', 'number': 'C.4.59', 'text': "Section 12.3.2 Inserting quotes with the 'content' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r12.4', 'number': 'C.4.60', 'text': 'Section 12.4 Automatic counters and numbering', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r12.4.3', 'number': 'C.4.61', 'text': "Section 12.4.3 Counters in elements with 'display: none'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r14.2', 'number': 'C.4.62', 'text': 'Section 14.2 The background', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r15.1', 'number': 'C.4.63', 'text': 'Section 15.1 Fonts Introduction', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r15.2', 'number': 'C.4.64', 'text': 'Section 15.2 Font matching algorithm', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r15.3', 'number': 'C.4.65', 'text': 'Section 15.2.2 Font family', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r15.3.1', 'number': 'C.4.66', 'text': 'Section 15.3.1 Generic font families', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r15.4', 'number': 'C.4.67', 'text': 'Section 15.4 Font styling', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r15.5', 'number': 'C.4.68', 'text': 'Section 15.5 Small-caps', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r15.6', 'number': 'C.4.69', 'text': 'Section 15.6 Font boldness', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r15.7', 'number': 'C.4.70', 'text': 'Section 15.7 Font size', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r16.1', 'number': 'C.4.71', 'text': 'Section 16.1 Indentation', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r16.2', 'number': 'C.4.72', 'text': 'Section 16.2 Alignment', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r16.3.1', 'number': 'C.4.73', 'text': 'Section 16.3.1 Underlining, over lining, striking, and blinking', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r16.5', 'number': 'C.4.74', 'text': 'Section 16.5 Capitalization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r16.6', 'number': 'C.4.75', 'text': 'Section 16.6 White space', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.1', 'number': 'C.4.76', 'text': 'Section 17.1 Introduction to tables', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.2', 'number': 'C.4.77', 'text': 'Section 17.2 The CSS table model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.2.1', 'number': 'C.4.78', 'text': 'Section 17.2.1 Anonymous table objects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.4', 'number': 'C.4.79', 'text': 'Section 17.4 Tables in the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.5', 'number': 'C.4.80', 'text': 'Section 17.5 Visual layout of table contents', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.5.1', 'number': 'C.4.81', 'text': 'Section 17.5.1 Table layers and transparency', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.5.2', 'number': 'C.4.82', 'text': 'Section 17.5.2 Table width algorithms', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.5.2.1', 'number': 'C.4.83', 'text': 'Section 17.5.2.1 Fixed table layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.5.2.2', 'number': 'C.4.84', 'text': 'Section 17.5.2.2 Automatic table layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.5.4', 'number': 'C.4.85', 'text': 'Section 17.5.4 Horizontal alignment in a column', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.5.5', 'number': 'C.4.86', 'text': 'Section 17.5.5 Dynamic row and column effects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.6.1', 'number': 'C.4.87', 'text': 'Section 17.6.1 The separated borders model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r17.6.2', 'number': 'C.4.88', 'text': 'Section 17.6.2 The collapsing borders model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r18.2', 'number': 'C.4.89', 'text': 'Section 18.2 System Colors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r18.4', 'number': 'C.4.90', 'text': 'Section 18.4 Dynamic outlines', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#r18.4.1', 'number': 'C.4.91', 'text': 'Section 18.4.1 Outlines and the focus', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#rD', 'number': 'C.4.92', 'text': 'Appendix D Default style sheet for HTML 4', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#errata', 'number': 'C.5', 'text': 'Errata since the Candidate Recommendation of July 2007', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.1.4.2.1', 'number': 'C.5.1', 'text': 'Section 1.4.2.1 Value', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.2.3', 'number': 'C.5.2', 'text': 'Section 2.3 The CSS 2.1 processing model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.3.1', 'number': 'C.5.3', 'text': 'Section 3.1 Definitions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.1.1', 'number': 'C.5.4', 'text': 'Section 4.1.1 Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.1.2.2', 'number': 'C.5.5', 'text': 'Section 4.1.2.2 Informative Historical Notes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.1.3', 'number': 'C.5.6', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.1.3a', 'number': 'C.5.7', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.1.3b', 'number': 'C.5.8', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.1.3c', 'number': 'C.5.9', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.1.5', 'number': 'C.5.10', 'text': 'Section 4.1.5 At-rules', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.1.7', 'number': 'C.5.11', 'text': 'Section 4.1.7 Rule sets, declaration blocks, and selectors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.2', 'number': 'C.5.12', 'text': 'Section 4.2 Rules for handling parsing errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.2a', 'number': 'C.5.13', 'text': 'Section 4.2 Rules for handling parsing errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.3.2', 'number': 'C.5.14', 'text': 'Section 4.3.2 Lengths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.3.5', 'number': 'C.5.15', 'text': 'Section 4.3.5 Counters', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.5.8.1', 'number': 'C.5.16', 'text': 'Section 5.8.1 Matching attributes and attribute values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.5.8.2', 'number': 'C.5.17', 'text': 'Section 5.8.2 Default attribute values in DTDs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.5.11.4', 'number': 'C.5.18', 'text': 'Section 5.11.4 The language pseudo-class: :lang', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.5.12.3', 'number': 'C.5.19', 'text': 'Section 5.12.3 The :before and :after pseudo-elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.6.3', 'number': 'C.5.20', 'text': 'Section 6.3 The @import rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.6.3a', 'number': 'C.5.21', 'text': 'Section 6.3 The @import rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.6.4.1', 'number': 'C.5.22', 'text': 'Section 6.4.1 Cascading order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.6.4.1a', 'number': 'C.5.23', 'text': 'Section 6.4.1 Cascading order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.7.2.1', 'number': 'C.5.24', 'text': 'Section 7.2.1 The @media rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.8.3.1', 'number': 'C.5.25', 'text': 'Section 8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.8.3.1a', 'number': 'C.5.26', 'text': 'Section 8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.8.3.1b', 'number': 'C.5.27', 'text': 'Section 8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.9.2.2', 'number': 'C.5.28', 'text': 'Section 9.2.2 Inline-level elements and inline boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.9.2.4', 'number': 'C.5.29', 'text': "Section 9.2.4 The 'display' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.9.3.2', 'number': 'C.5.30', 'text': "Section 9.3.2 Box offsets: 'top', 'right', 'bottom', 'left'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.9.5', 'number': 'C.5.31', 'text': 'Section 9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.9.5a', 'number': 'C.5.32', 'text': 'Section 9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.9.5.2', 'number': 'C.5.33', 'text': "Section 9.5.2 Controlling flow next to floats: the 'clear' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.9.6.1', 'number': 'C.5.34', 'text': 'Section 9.6.1 Fixed positioning', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.9.9.1', 'number': 'C.5.35', 'text': "Section 9.9.1 Specifying the stack level: the 'z-index' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.1', 'number': 'C.5.36', 'text': 'Section 10.1 Definition of "containing block"', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3', 'number': 'C.5.37', 'text': 'Section 10.3 Calculating widths and margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.1', 'number': 'C.5.38', 'text': 'Section 10.3.1 Inline, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.2', 'number': 'C.5.39', 'text': 'Section 10.3.2 Inline, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.2a', 'number': 'C.5.40', 'text': 'Section 10.3.2 Inline, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.3', 'number': 'C.5.41', 'text': 'Section 10.3.3 Block-level, non-replaced elements in normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.7', 'number': 'C.5.42', 'text': 'Section 10.3.7 Absolutely positioned, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.7a', 'number': 'C.5.43', 'text': 'Section 10.3.7 Absolutely positioned, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.8', 'number': 'C.5.44', 'text': 'Section 10.3.8 Absolutely positioned, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.8a', 'number': 'C.5.45', 'text': 'Section 10.3.8 Absolutely positioned, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.3.8c', 'number': 'C.5.46', 'text': 'Section 10.3.8 Absolutely positioned, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.5', 'number': 'C.5.47', 'text': "Section 10.5 Content height: the 'height' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.6.2', 'number': 'C.5.48', 'text': 'Section 10.6.2 Inline replaced elements […]', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.6.4', 'number': 'C.5.49', 'text': 'Section 10.6.4 Absolutely positioned, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.6.5', 'number': 'C.5.50', 'text': 'Section 10.6.5 Absolutely positioned, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.10.8.1', 'number': 'C.5.51', 'text': 'Section 10.8.1 Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.11.1.1', 'number': 'C.5.52', 'text': "Section 11.1.1 Overflow: the 'overflow' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.11.1.2', 'number': 'C.5.53', 'text': "Section 11.1.2 Clipping: the 'clip' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.12.2', 'number': 'C.5.54', 'text': "Section 12.2 The 'content' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.12.4.2', 'number': 'C.5.55', 'text': 'Section 12.4.2 Counter styles', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.12.5', 'number': 'C.5.56', 'text': 'Section 12.5 Lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.12.5.1', 'number': 'C.5.57', 'text': "Section 12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.12.5.1a', 'number': 'C.5.58', 'text': "Section 12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.12.5.1b', 'number': 'C.5.59', 'text': "Section 12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.2', 'number': 'C.5.60', 'text': 'Section 13.2 Page boxes: the @page rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.2.1.1', 'number': 'C.5.61', 'text': 'Section 13.2.1.1 Rendering page boxes that do not fit a target sheet', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.2.3', 'number': 'C.5.62', 'text': 'Section 13.2.3 Content outside the page box', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.1', 'number': 'C.5.63', 'text': "Section 13.3.1 Page break properties: 'page-break-before', 'page-break-after', 'page-break-inside'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.1a', 'number': 'C.5.64', 'text': "Section 13.3.1 Page break properties: 'page-break-before', 'page-break-after', 'page-break-inside'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.2', 'number': 'C.5.65', 'text': "Section 13.3.2 Breaks inside elements: 'orphans', 'widows'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.2a', 'number': 'C.5.66', 'text': "Section 13.3.2 Breaks inside elements: 'orphans', 'widows'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.3', 'number': 'C.5.67', 'text': 'Section 13.3.3 Allowed page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.3a', 'number': 'C.5.68', 'text': 'Section 13.3.3 Allowed page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.3b', 'number': 'C.5.69', 'text': 'Section 13.3.3 Allowed page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.5', 'number': 'C.5.70', 'text': 'Section 13.3.5 "Best" page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.14.2', 'number': 'C.5.71', 'text': 'Section 14.2 The background', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.14.2a', 'number': 'C.5.72', 'text': 'Section 14.2 The background', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.14.2.1a', 'number': 'C.5.73', 'text': "Section 14.2.1 Background properties: 'background-color', 'background-image', 'background-repeat', 'background-attachment', 'background-position', and 'background'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.15.6', 'number': 'C.5.74', 'text': "Section 15.6 Font boldness: the 'font-weight' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.16.6', 'number': 'C.5.75', 'text': "Section 16.6 Whitespace: the 'white-space' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.16.6.1', 'number': 'C.5.76', 'text': "Section 16.6.1 The 'white-space' processing model", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.17.2.1', 'number': 'C.5.77', 'text': 'Section 17.2.1 Anonymous table objects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.17.2.1a', 'number': 'C.5.78', 'text': 'Section 17.2.1 Anonymous table objects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.17.4', 'number': 'C.5.79', 'text': 'Section 17.4 Tables in the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.17.5.4a', 'number': 'C.5.80', 'text': 'Section 17.5.4 Horizontal alignment in a column', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.18.1', 'number': 'C.5.81', 'text': "Section 18.1 Cursors: the 'cursor' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.B.2', 'number': 'C.5.82', 'text': 'Section B.2 Informative references', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.D', 'number': 'C.5.83', 'text': 'Appendix D. Default style sheet for HTML 4', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.Da', 'number': 'C.5.84', 'text': 'Appendix D. Default style sheet for HTML 4', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.E.2', 'number': 'C.5.85', 'text': 'Section E.2 Painting order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.G', 'number': 'C.5.86', 'text': 'Appendix G. Grammar of CSS 2.1', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.G.1', 'number': 'C.5.87', 'text': 'Section G.1 Grammar', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.G.2', 'number': 'C.5.88', 'text': 'Section G.2 Lexical scanner', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.G.2a', 'number': 'C.5.89', 'text': 'Section G.2 Lexical scanner', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.G.2b', 'number': 'C.5.90', 'text': 'Section G.2 Lexical scanner', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.G.2c', 'number': 'C.5.91', 'text': 'Section G.2 Lexical scanner', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.I', 'number': 'C.5.92', 'text': 'Appendix I. Index', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#errata2', 'number': 'C.6', 'text': 'Errata since the Candidate Recommendation of April 2009', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.4.2b', 'number': 'C.6.1', 'text': 'Section 4.2 Rules for handling parsing errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.13.3.3c', 'number': 'C.6.2', 'text': 'Section 13.3.3 Allowed page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.15.3', 'number': 'C.6.3', 'text': "Section 15.3 Font family: the 'font-family' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.15.3.1.1', 'number': 'C.6.4', 'text': 'Section 15.3.1.1 serif', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.15.7', 'number': 'C.6.5', 'text': "Section 15.7 Font size: the 'font-size' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.17.5.2.1', 'number': 'C.6.6', 'text': 'Section 17.5.2.1 Fixed table layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.17.5.3', 'number': 'C.6.7', 'text': 'Section 17.5.3 Table height layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#s.Ga', 'number': 'C.6.8', 'text': 'Appendix G. Grammar of CSS 2.1', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#errata3', 'number': 'C.7', 'text': 'Errata since the Candidate Recommendation of September 2009', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.1', 'number': 'C.7.1', 'text': 'Section 1.4.2.1 Value', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.3.1', 'number': 'C.7.2', 'text': 'Section 3.1 Definitions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.1.1', 'number': 'C.7.3', 'text': 'Section 4.1.1 Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.1.1a', 'number': 'C.7.4', 'text': 'Section 4.1.1 Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.1.1b', 'number': 'C.7.5', 'text': 'Section 4.1.1 Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.1.1c', 'number': 'C.7.6', 'text': 'Section 4.1.1 Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.1.2.2', 'number': 'C.7.7', 'text': 'Section 4.1.2.2 Informative Historical Notes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.1.3', 'number': 'C.7.8', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.1.3a', 'number': 'C.7.9', 'text': 'Section 4.1.3 Characters and case', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.1.8', 'number': 'C.7.10', 'text': 'Section 4.1.8 Declarations and properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.2', 'number': 'C.7.11', 'text': 'Section 4.2 Rules for handling parsing errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.3.2', 'number': 'C.7.12', 'text': 'Section 4.3.2 Lengths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.3.2a', 'number': 'C.7.13', 'text': 'Section 4.3.2 Lengths', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.3.4a', 'number': 'C.7.14', 'text': 'Section 4.3.4 URLs and URIs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.4.3.4', 'number': 'C.7.15', 'text': 'Section 4.3.4 URLs and URIs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.5.8.2', 'number': 'C.7.16', 'text': 'Section 5.8.2 Default attribute values in DTDs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.5.11.4', 'number': 'C.7.17', 'text': 'Section 5.11.4 The language pseudo-class: :lang', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.5.12', 'number': 'C.7.18', 'text': 'Section 5.12 Pseudo-elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.5.12.1', 'number': 'C.7.19', 'text': 'Section 5.12.1 The :first-line pseudo-element', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.5.12.2', 'number': 'C.7.20', 'text': 'Section 5.12.2 The :first-letter pseudo-element', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.6.2', 'number': 'C.7.21', 'text': 'Section 6.2 Inheritance', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.6.4.4', 'number': 'C.7.22', 'text': 'Section 6.4.4 Precedence of non-CSS presentational hints', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.7.3', 'number': 'C.7.23', 'text': 'Section 7.3 Recognized media types', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.8.3.1', 'number': 'C.7.24', 'text': 'Section 8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.8.3.1a', 'number': 'C.7.25', 'text': 'Section 8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.1', 'number': 'C.7.26', 'text': 'Section 9.2.1 Block-level elements and block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.1.1', 'number': 'C.7.27', 'text': 'Section 9.2.1.1 Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.1.1a', 'number': 'C.7.28', 'text': 'Section 9.2.1.1 Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.1.1b', 'number': 'C.7.29', 'text': 'Section 9.2.1.1 Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.1.1c', 'number': 'C.7.30', 'text': 'Section 9.2.1.1 Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.2', 'number': 'C.7.31', 'text': 'Section 9.2.2 Inline-level elements and inline boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.3a', 'number': 'C.7.32', 'text': 'Section 9.2.3 Run-in boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.4', 'number': 'C.7.33', 'text': "Section 9.2.4 The 'display' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.2.4a', 'number': 'C.7.34', 'text': "Section 9.2.4 The 'display' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.3', 'number': 'C.7.35', 'text': 'Section 9.3 Positioning schemes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.4', 'number': 'C.7.36', 'text': 'Section 9.4 Normal flow', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.3.2', 'number': 'C.7.37', 'text': "Section 9.3.2 Box offsets: 'top', 'right', 'bottom', 'left'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5', 'number': 'C.7.38', 'text': 'Section 9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5a', 'number': 'C.7.39', 'text': 'Section 9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5.2', 'number': 'C.7.40', 'text': "Section 9.5.2 Controlling flow next to floats: the 'clear' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5.2a', 'number': 'C.7.41', 'text': "Section 9.5.2 Controlling flow next to floats: the 'clear' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5.2b', 'number': 'C.7.42', 'text': "Section 9.5.2 Controlling flow next to floats: the 'clear' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5.2c', 'number': 'C.7.43', 'text': "Section 9.5.2 Controlling flow next to floats: the 'clear' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.14.2.1', 'number': 'C.7.44', 'text': 'Section 14.2.1 Background properties', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.9.1', 'number': 'C.7.45', 'text': "Section 9.9.1 Specifying the stack level: the 'z-index' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.10', 'number': 'C.7.46', 'text': "Section 9.10 Text direction: the 'direction' and 'unicode-bidi' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.10a', 'number': 'C.7.47', 'text': "Section 9.10 Text direction: the 'direction' and 'unicode-bidi' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.10b', 'number': 'C.7.48', 'text': "Section 9.10 Text direction: the 'direction' and 'unicode-bidi' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.1', 'number': 'C.7.49', 'text': 'Section 10.1 Definition of "containing block"', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.2', 'number': 'C.7.50', 'text': "Section 10.2 Content width: the 'width' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.2a', 'number': 'C.7.51', 'text': "Section 10.2 Content width: the 'width' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.2b', 'number': 'C.7.52', 'text': "Section 10.2 Content width: the 'width' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.5', 'number': 'C.7.53', 'text': "Section 10.5 Content height: the 'height' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.5a', 'number': 'C.7.54', 'text': "Section 10.5 Content height: the 'height' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.6.7', 'number': 'C.7.55', 'text': "Section 10.6.7 'Auto' heights for block formatting context roots", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.7', 'number': 'C.7.56', 'text': "Section 10.7 Minimum and maximum heights: 'min-height' and 'max-height'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.8', 'number': 'C.7.57', 'text': "Section 10.8 Line height calculations: the 'line-height' and 'vertical-align' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.8a', 'number': 'C.7.58', 'text': "Section 10.8 Line height calculations: the 'line-height' and 'vertical-align' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.8.1', 'number': 'C.7.59', 'text': 'Section 10.8.1 Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.8.1a', 'number': 'C.7.60', 'text': 'Section 10.8.1 Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.8.1b', 'number': 'C.7.61', 'text': 'Section 10.8.1 Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.11.1', 'number': 'C.7.62', 'text': 'Section 11.1 Overflow and clipping', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.11.1.1', 'number': 'C.7.63', 'text': "Section 11.1.1 Overflow: the 'overflow' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.11.1.1a', 'number': 'C.7.64', 'text': "Section 11.1.1 Overflow: the 'overflow' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.11.1.1b', 'number': 'C.7.65', 'text': "Section 11.1.1 Overflow: the 'overflow' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.11.1.2', 'number': 'C.7.66', 'text': "Section 11.1.2 Clipping: the 'clip' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.12.5', 'number': 'C.7.67', 'text': 'Section 12.5 Lists', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.12.5.1', 'number': 'C.7.68', 'text': "Section 12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.12.5.1a', 'number': 'C.7.69', 'text': "Section 12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.12.5.1b', 'number': 'C.7.70', 'text': "Section 12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.12.5.1c', 'number': 'C.7.71', 'text': "Section 12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.12.5.1d', 'number': 'C.7.72', 'text': "Section 12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.13.2', 'number': 'C.7.73', 'text': 'Section 13.2 Page boxes: the @page rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.13.2.2', 'number': 'C.7.74', 'text': 'Section 13.2.2 Page selectors: selecting left, right, and first pages', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.13.3.2', 'number': 'C.7.75', 'text': "Section 13.3.2 Breaks inside elements: 'orphans', 'widows'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.13.3.3', 'number': 'C.7.76', 'text': 'Section 13.3.3 Allowed page breaks', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.15.3', 'number': 'C.7.77', 'text': "Section 15.3 Font family: the 'font-family' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.15.3.1', 'number': 'C.7.78', 'text': 'Section 15.3.1 Generic font families', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.15.6', 'number': 'C.7.79', 'text': "Section 15.6 Font boldness: the 'font-weight' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.15.6q', 'number': 'C.7.80', 'text': "Section 15.6 Font boldness: the 'font-weight' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.15.7', 'number': 'C.7.81', 'text': "Section 15.7 Font size: the 'font-size' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.1', 'number': 'C.7.82', 'text': "Section 16.1 Indentation: the 'text-indent' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.1a', 'number': 'C.7.83', 'text': "Section 16.1 Indentation: the 'text-indent' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.2', 'number': 'C.7.84', 'text': "Section 16.2 Alignment: the 'text-align' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.2a', 'number': 'C.7.85', 'text': "Section 16.2 Alignment: the 'text-align' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.3.1', 'number': 'C.7.86', 'text': "Section 16.3.1 Underlining, overlining, striking, and blinking: the 'text-decoration' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.3.1a', 'number': 'C.7.87', 'text': "Section 16.3.1 Underlining, overlining, striking, and blinking: the 'text-decoration' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.4', 'number': 'C.7.88', 'text': "Section 16.4 Letter and word spacing: the 'letter-spacing' and 'word-spacing' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.6', 'number': 'C.7.89', 'text': "Section 16.6 White space: the 'white-space' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.6.1', 'number': 'C.7.90', 'text': "Section 16.6.1 The 'white-space' processing model", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.6.1a', 'number': 'C.7.91', 'text': "Section 16.6.1 The 'white-space' processing model", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.16.6.1b', 'number': 'C.7.92', 'text': "Section 16.6.1 The 'white-space' processing model", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.17.2', 'number': 'C.7.93', 'text': 'Section 17.2 The CSS table model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.17.2.1', 'number': 'C.7.94', 'text': 'Section 17.2.1 Anonymous table objects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.17.2.1a', 'number': 'C.7.95', 'text': 'Section 17.2.1 Anonymous table objects', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.17.4', 'number': 'C.7.96', 'text': 'Section 17.4 Tables in the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.17.4a', 'number': 'C.7.97', 'text': 'Section 17.4 Tables in the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.17.5.2.2', 'number': 'C.7.98', 'text': 'Section 17.5.2.2 Automatic table layout', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.17.5.3', 'number': 'C.7.99', 'text': 'Section 17.5.3 Table height algorithms', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.17.5.4', 'number': 'C.7.100', 'text': 'Section 17.5.4 Horizontal alignment in a column', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.B.2', 'number': 'C.7.101', 'text': 'Section B.2 Informative references', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.D', 'number': 'C.7.102', 'text': 'Section D. Default style sheet for HTML 4', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.E.2', 'number': 'C.7.103', 'text': 'Section E.2 Painting order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.G', 'number': 'C.7.104', 'text': 'Appendix G Grammar of CSS 2.1', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#errata4', 'number': 'C.8', 'text': 'Changes since the working draft of 7 December 2010', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.8.3.1', 'number': 'C.8.1', 'text': '8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.8.1', 'number': 'C.8.2', 'text': '10.8.1 Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.3', 'number': 'C.8.3', 'text': '10.3 Calculating widths and margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.14.3', 'number': 'C.8.4', 'text': '14.3 Gamma correction', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.11.1.2', 'number': 'C.8.5', 'text': "11.1.2 Clipping: the 'clip' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.4.2', 'number': 'C.8.6', 'text': '9.4.2 Inline formatting contexts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.3.2', 'number': 'C.8.7', 'text': '10.3.2 Inline, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.1', 'number': 'C.8.8', 'text': '10.1 Definition of "containing block"', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.13.2.2', 'number': 'C.8.9', 'text': '13.2.2 Page selectors: selecting left, right, and first pages', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.8.3.1a', 'number': 'C.8.10', 'text': '8.3.1 Collapsing margins', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.8', 'number': 'C.8.11', 'text': "10.8 Line height calculations: the 'line-height' and 'vertical-align' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.8.1a', 'number': 'C.8.12', 'text': '10.8.1 Leading and half-leading', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.6.1a', 'number': 'C.8.13', 'text': '10.6.1 Inline, non-replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.5.1', 'number': 'C.8.14', 'text': "9.5.1 Positioning the float: the 'float' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.2.1.1', 'number': 'C.8.15', 'text': '9.2.1.1 Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.5.12.1', 'number': 'C.8.16', 'text': '5.12.1 The :first-line pseudo-element', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.16.6', 'number': 'C.8.17', 'text': "16.6 White space: the 'white-space' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.12.5.1', 'number': 'C.8.18', 'text': "12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.7', 'number': 'C.8.19', 'text': "9.7 Relationships between 'display', 'position', and 'float'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.4.2a', 'number': 'C.8.20', 'text': '9.4.2 Inline formatting contexts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.4.1.9', 'number': 'C.8.21', 'text': '4.1.9 Comments', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.12.5.1a', 'number': 'C.8.22', 'text': "12.5.1 Lists: the 'list-style-type', 'list-style-image', 'list-style-position', and 'list-style' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.5.1a', 'number': 'C.8.23', 'text': "9.5.1 Positioning the float: the 'float' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.3', 'number': 'C.8.24', 'text': '9.3 Positioning schemes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.10', 'number': 'C.8.25', 'text': "9.10 Text direction: the 'direction' and 'unicode-bidi' properties", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.16.3.1', 'number': 'C.8.26', 'text': "16.3.1 Underlining, overlining, striking, and blinking: the 'text-decoration' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.16.3.1a', 'number': 'C.8.27', 'text': "16.3.1 Underlining, overlining, striking, and blinking: the 'text-decoration' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.4', 'number': 'C.8.28', 'text': "10.4 Minimum and maximum widths: 'min-width' and 'max-width'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.3.2', 'number': 'C.8.29', 'text': "9.3.2 Box offsets: 'top', 'right', 'bottom', 'left'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.2.1.1a', 'number': 'C.8.30', 'text': '9.2.1.1 Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.2.1.1b', 'number': 'C.8.31', 'text': '17.4 Tables in the visual formatting model', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.11.1.2a', 'number': 'C.8.32', 'text': "11.1.2 Clipping: the 'clip' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.13.2', 'number': 'C.8.33', 'text': '13.2 Page boxes: the @page rule', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.4.1.1', 'number': 'C.8.34', 'text': '4.1.1 Tokenization', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.4.2', 'number': 'C.8.35', 'text': '4.2 Rules for handling parsing errors', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.3.1', 'number': 'C.8.36', 'text': '3.1 Definitions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.4.3.4', 'number': 'C.8.37', 'text': '4.3.4 URLs and URIs', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.5', 'number': 'C.8.38', 'text': '9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.11.1.1', 'number': 'C.8.39', 'text': "11.1.1 Overflow: the 'overflow' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.2.1.1c', 'number': 'C.8.40', 'text': '9.2.1.1 Anonymous block boxes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.16.2', 'number': 'C.8.41', 'text': "16.2 Alignment: the 'text-align' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.5a', 'number': 'C.8.42', 'text': '9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.4.2b', 'number': 'C.8.43', 'text': '9.4.2 Inline formatting contexts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.5.12', 'number': 'C.8.44', 'text': '5.12 Pseudo-elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.5b', 'number': 'C.8.45', 'text': '9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.5c', 'number': 'C.8.46', 'text': '9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.14.2.1', 'number': 'C.8.47', 'text': "14.2.1 Background properties: 'background-color', 'background-image', 'background-repeat', 'background-attachment', 'background-position', and 'background'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.9.2.4', 'number': 'C.8.48', 'text': "9.2.4 The 'display' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.6.1.2', 'number': 'C.8.49', 'text': '6.1.2 Computed values', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#u.10.3.2a', 'number': 'C.8.50', 'text': '10.3.2 Inline, replaced elements', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5.2d', 'number': 'C.8.51', 'text': "Section 9.5.2 Controlling flow next to floats: the 'clear' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.G.2', 'number': 'C.8.52', 'text': 'G.2 Lexical scanner', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5.2e', 'number': 'C.8.53', 'text': "Section 9.5.2 Controlling flow next to floats: the 'clear' property", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.9.5b', 'number': 'C.8.54', 'text': '9.5 Floats', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/changes.html#t.10.6.3', 'number': 'C.8.55', 'text': "10.6.3 Block-level non-replaced elements in normal flow when 'overflow' computes to 'visible'", 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/sample.html#q22.0', 'number': 'D', 'text': 'Default style sheet for HTML 4', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/zindex.html#q23.0', 'number': 'E', 'text': 'Elaborate description of Stacking Contexts', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/zindex.html#stacking-defs', 'number': 'E.1', 'text': 'Definitions', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/zindex.html#painting-order', 'number': 'E.2', 'text': 'Painting order', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/zindex.html#stacking-notes', 'number': 'E.3', 'text': 'Notes', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/propidx.html#q24.0', 'number': 'F', 'text': 'Full property table', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/grammar.html#q25.0', 'number': 'G', 'text': 'Grammar of CSS 2.1', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/grammar.html#grammar', 'number': 'G.1', 'text': 'Grammar', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/grammar.html#scanner', 'number': 'G.2', 'text': 'Lexical scanner', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/grammar.html#tokenizer-diffs', 'number': 'G.3', 'text': 'Comparison of tokenization in CSS 2.1 and CSS1', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/grammar.html#q25.4', 'number': 'G.4', 'text': 'Implementation note', 'spec': 'CSS 2'}
WARNING: Invalid heading - URL doesn't start with the spec's url <https://www.w3.org/TR/CSS21/>.
{'url': 'https://www.w3.org/TR/CSS2/indexlist.html#q27.0', 'number': 'I', 'text': 'Index', 'spec': 'CSS 2'}
WARNING: Despite claiming to have a snapshot url, no snapshot data found for 'dom-level-2-style'.
WARNING: Despite claiming to have a snapshot url, no snapshot data found for 'selectors-nonelement-1'.
WARNING: Despite claiming to have a snapshot url, no snapshot data found for 'tracking-dnt'.
|████████████████████████████████████████| 587/587 [100%] in 4:56.0 (1.98/s) 
Success!
Downloading biblio data...
FATAL ERROR: Biblio line in unexpected format:
404: Not Found
Traceback (most recent call last):
  File "/sites/api.csswg.org/python310venv/bin/bikeshed", line 8, in 
    sys.exit(main())
  File "/sites/api.csswg.org/python310venv/lib/python3.10/site-packages/bikeshed/cli.py", line 445, in main
    update.fixupDataFiles(options.noUpdate)
  File "/sites/api.csswg.org/python310venv/lib/python3.10/site-packages/bikeshed/update/main.py", line 108, in fixupDataFiles
    update()
  File "/sites/api.csswg.org/python310venv/lib/python3.10/site-packages/bikeshed/update/main.py", line 55, in update
    "biblio": updateBiblio.update(path=path, dryRun=dryRun) if biblio else None,
  File "/sites/api.csswg.org/python310venv/lib/python3.10/site-packages/bikeshed/update/updateBiblio.py", line 19, in update
    biblio.processReferBiblioFile(getCSSWGData(), biblios, order=4)
  File "/sites/api.csswg.org/python310venv/lib/python3.10/site-packages/bikeshed/biblio.py", line 230, in processReferBiblioFile
    storage[biblio["linkText"].lower()].append(NormalBiblioEntry(**biblio))
KeyError: 'linkText'

Please correct the error and update the source file.

Last Bikeshed run at 2025-03-12 15:12:40 PDT