James Clark, (February 23, 1964) 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 small 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 (for example: ""), and the name "XML".

Since November 2004, he has been working for Thailand's Software Industry Promotion Agency (SIPA), to promote open source technologies and open standards in the country. Part of his current job is pushing the Thai localization of OpenOffice.org office suite and Mozilla Firefox web browser, along with other open source software packages.

For the GNU project, he wrote groff and an xml editing mode for GNU Emacs.

He is listed as part of the Working Group that developed the Java Streaming API for XML ( StAX ) JSR 173 at the JCP

Projects at SIPA

Chantra : cd opensource software for thai. Like the OpenCD project. (Chantra English page)

Suriyan : Linux distribution for SME server (Based on Debian). (Suriyan English page)