Welcome to the XHTML Resource Center. XHTML (the Extensible HyperText Markup Language) is a successor to HTML that extends HTML, and makes it XML compliant. Start your search here for XHTML resources, including introductory tutorials, videos, webcasts, books, sample chapters, tools, FAQs and more. In the XHTML Resource Center you’ll find links to:

• XHTML Coding rules and syntax from Devguru.
• The article, “XHTML 2.0: Introduction,” from the W3C.
• The article, “XHTML: The Clean Code Solution,” by Peter Wiggin.
• The article, “XHTML 2.0: The Latest Trick,” by Kendall Grant Clark.
• The article, “XHTML, from an HTML Starting Point,” by Paul Watson.
• The DevGuru XHTML Quick Reference Guide.
• The O’Reilly XHTML/HTML blog.
• The tutorial, “XHTML MP (Mobile Profile) Introduction,” from Developers’ Home.
• The sample chapter: “HTML and XHTML Basics,” from HTML and XHTML Step by Step, by Faithe Wempen.
• The home page for the XHTML Working Group from the W3C.
• The HTML TIDY free utility that converts an HTML web page to XHTML, helps fix editing mistakes and more.
• The CSE HTML Validator Professional tool from AI Internet Solutions that helps users create correct and accessible HTML, XHTML and CSS documents.
• The W3C’s free markup validation service that can check HTML and XHTML web documents to see if they are in compliance with the W3C recommendations and other standards.
• The W3C’s free link checker that reads a document (HTML or XHTML) and forms a list of links and anchors, makes sure an anchor is defined only once, checks that all links are dereferencable and warns of HTTP redirects.
• The XStandard Lite plug-in from Belus Technology—a free WYSIWYG editor that generates XHTML Strict or 1.1 markup and can manage rich multilingual content.
• A free XHTML 1.0 certification test from ExpertRating.
• The XHTML specification.
• An XHTML video from Harvard University that explains what XHTML is, and discuses DTDs, elements, tags, writing tags, links, attributes, validating a web page and more.
• XHTML books, training courses, newsletters and videos.
• And more…