James Clark (programmer)

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James Clark
London, England
Fields XML, Open source
Institutions Thai Open Source Software Center
SIPA (Software Industry Promotion Agency, Ministry of Information and Communication Technology)
Alma mater Charterhouse
Merton College, Oxford
Known for XML
Notable awards In , awarded the first XML Cup

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 , 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.

For the GNU project, he wrote groff, as well as an XML editing mode for GNU Emacs.

XML-related work[edit]

James Clark served as Technical Lead of the Working Group that developed XML—notably contributing the self-closing, empty-element tag syntax (for example: "<tagname/>"), and the name XML.[1] His contributions to XML are cited in dozens of books on the subject.

James is the author or co-author of a number of influential specifications and implementations, including:

An SGML transformation and styling language.
An open-source XML parser.
XSL Transformations, a part of the XSL family.
An XML Schema language.
An XML Schema language, with both an explicit XML syntax and a compact syntax.
An implementation of RELAX NG.
Clark Notation
A way to express an XML Name in a compact way[2]

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

Work at SIPA[edit]

From until late , Clark worked for Thailand's Software Industry Promotion Agency (SIPA), to promote open source technologies and open standards in the country. This work included pushing the Thai localization of OpenOffice.org office suite and the Mozilla Firefox Web browser, along with other open source software packages.

Other projects at SIPA include:

  • Chantra: An open source Thai project with programs for Windows. Like the OpenCD project.
  • Suriyan GNU/Linux: An extremely user-friendly "instant server" system for small and medium-sized companies (not to be confused with SIPA's new, unrelated project with a similar name, Suriyan Linux Live CD).


  1. ^ "The History of XML". Total XML. 
  2. ^ Clark, James. "XML Namespaces". James Clark's Home Page. Retrieved 17 September 2015. 

External links[edit]