Here is a free Mac OS X utility by Todd Ditchendorf for all you concerned web designers out there. XML Nanny allows you to validate your XML and XHTML documents (either locally or over a network ...

XML and XHTML are not the same thing.<P>XML is a way of defining data and doesn't contain any formatting information within it's structure.<P>XHTML is HTML 4.01 with a strict set of guidelines ...

Some features of XHTML 2 will be built into HTML 5, so the XHTML 2 work won't have been for naught, assuming a critical mass of browser makers do in fact include the necessary XML parser along the ...

XHTML documents are readily viewed, edited, and validated with standard XML tools. XHTML documents can be written to operate as well as or better than they did before in existing HTML 4-conforming ...

You would use XML if you 'consume' any web services (see W in this series - Do you speak my language: W is for Web services, Wiki, W3C, Webserver, WWW, Wordpress), or you could use XML if you use ...