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Rules
Glossary
About
Rules
Glossary
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formatting
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images and media
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The rules
70
The source code of each page includes metadata defining the character set
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72
Page content is organized according to a hierarchical structure of headings and subheadings
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73
Visually presented lists use appropriate semantic markup in the source code
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74
Each HTML identifier is unique within a Content Document
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75
Data table cells are associated with their headers
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