XHTML Contributor

From Wikipedia: Extensible Hypertext Markup Language (XHTML) is a family of XML markup languages that mirror or extend versions of the widely used Hypertext Markup Language (HTML), the language in which Web pages are formulated.

Klaus participated as contributor in the World Wide Web Consortium’s XHTML working group. The standard version 1.0 released in early 2000. As an application of XML, XHTML was intended to provide a cleaner and more verifiable version of HTML.