James Clark, is the author of groff and expat and has done much work with open-source software and XML. Born in London, and educated at Charterhouse and Merton College, Oxford, Clark has lived in Bangkok, Thailand since 1995, and is now a permanent resident. He owns a company called Thai Open Source Software Center, which provides him a legal framework for his open-source activities. James Clark served as Technical Lead of the Working Group that developed XML, notably contributing the self-closing, empty-element tag syntax, and the name "XML". James Clark's contributions to XML are cited in dozens of books on the subject. For the GNU project, he wrote groff and an XML editing mode for GNU Emacs. James is the author or co-author of a number of influential specifications and implementations, including: DSSSL - An SGML transformation and styling language. Expat - An open-source XML parser. XSLT - XSL Transformations, a part of the XSL family. TREX - An XML Schema language. RELAX NG - An XML Schema language with both an explicit XML form and a compact form, with an implementation, Jing. 

February 23rd, 1964 in London (Age 60)