Eric van der Vlist is an independent consultant and trainer. His domains of expertise include web development and XML technologies. He is the creator and main editor of XMLfr.org, the main site dedicated to XML technologies in French, the lead author of Professional Web 2.0 Programming, the author of the O'Reilly animal books XML Schema and RELAX NG and a member or the ISO DSDL (http://dsdl.org) working group focused on XML schema languages. he is based in Paris and can be reached at vdv@dyomedea.com , or meet him at one of the many conferences where he presents his projects.