Simon Willison’s Weblog

Use HTML 4.01, not XHTML. Why Stuart’s book uses HTML, not XHTML.

Posted 21st February 2005 at 12:52 pm

Recent articles

JustHTML is a fascinating example of vibe engineering in action - 14th December 2025
OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025

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