X

Xenu Link Sleuth

Popular free software for checking a site for broken internal or external links and creating a sitemap.

See also:

  • Xenu – official site

XHTML

Extensible HyperText Markup Language is a class of specifications designed to move HTML to conform to XML formatting.

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XML

Extensible Markup Language is a simple, very flexible text format derived from SGML, used to make it easy to syndicate or format information using technologies such as RSS.

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