A living standard for a web stack that AI agents can verify, not just generate
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Updated
Jun 23, 2026
A living standard for a web stack that AI agents can verify, not just generate
HTML5 is the fifth major version of the HyperText Markup Language used for structuring and presenting content on the web.
HTML (HyperText Markup Language) is the standard markup language for creating web pages and web applications. Maintained as a Living Standard by WHATWG and developed in close coordination with the W3C, HTML defines the structure and semantics of web content alongside CSS for presentation and JavaScript for behavior.
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