https://www.w3.org/TR/xhtml-rdfa/
XHTML+RDFa 1.1 - Third Edition
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https://xstandard.com/
XStandard: free standards-compliant XHTML WYSIWYG editor
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https://gmpg.org/xmdp/
XMDP - XHTML Meta Data Profiles
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https://w3techs.com/technologies/details/ml-xhtml_any
Usage Statistics and Market Share of XHTML for Websites, April 2026
How many websites are using XHTML
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https://xhtml.club/
XHTML Club - Extreme HyperText Movement for Luddites
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https://www.w3.org/TR/2015/REC-xhtml-rdfa-20150317/
XHTML+RDFa 1.1 - Third Edition
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https://www.developershome.com/
Developer's Home - Tutorials and Articles for SMS, WML, WMLScript, WAP 2.0, XHTML MP, WCSS/WAP CSS
Learn mobile technologies like SMS, WAP / WAP 2.0, WML, WMLScript, XHTML MP and WCSS / WAP CSS through tutorials, articles and code examples.
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https://is.wikibooks.org/wiki/XHTML
XHTML - Wikibækur, hið frjálsa netbókasafn
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https://caniuse.com/?search=ciu/xhtml
"ciu/xhtml" | Can I use... Support tables for HTML5, CSS3, etc
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https://www.w3.org/standards/history/xhtml-media-types/
XHTML Media Types - Second Edition publication history | Standards | W3C
The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web...
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https://www.smashingmagazine.com/2009/07/free-typographic-xhtmlcss-layouts-for-your-designs/
Free Typographic XHTML/CSS-Layouts For Your Designs — Smashing Magazine
In May we announced the [Typographic Layout Design Contest](https://www.smashingmagazine.com/2009/05/21/typographic-layout-design-contest-join-in-and-win/)...
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https://www.w3.org/TR/xhtml1/
XHTML 1.0: The Extensible HyperText Markup Language (Second Edition)
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