The American School in Japan
Extensible Hypertext Markup Language (XHTML) is an XML application intended
to replace HTML and version 1 is almost identical to HTML 4.01. XHTML, unlike
HTML, does not allow improper elements or formatting. However, only browsers
with version 5 or later support XHTML.
- W3Schools XHTML Tutorial
- This tutorial on XHTML provides numerous examples and also has a "try
it yourself" feature where you can edit XHTML, then click a test button
to see how it works in your browser.
- David Gowan's
- David Gowan's XHTML tutorial is very basic, but it helps you understand
the basic differences between HTML and XHTML.
- W3 Organization XHTML Recommendation
- The W3 Consortium is the definitive source for the specification. They
also have a CSS validator and an XHTML validator which will scan your page
and validate it's compliance to CSS or XHTML standards.
- W3 Organization Validator Service
- Validate your pages against the W3 Organization HTML, XHTML, and CSS
standards. If your pages pass, you then have permission to use a logo on
your page that signifies compliance. However, if you have developed your
pages with FrontPage, they will not validate until you add the correct !DOCTYPE
tag as the first line of the file.