TEI

TEI, or the Text Encoding Initiative is a large and widely-used markup language for scholarly publishing and data processing, which has been widely used in projects in the humanities, social sciences and linguistics. It began as an large and configurable SGML tag set, but is now availabe in XML. The tags have been stable for over a decade, with TEI P3 (public release version 3) published in 1994, and updated in 1999. P4 (2002) is a slight update to accommodate XML. There is ongoing work on P5 which is expected to break backward compatibility. Maintenance and development continues under the sponsorship of the TEI Consortium. The TEI component for marking up feature structures (a model of data used in linguistics) is also the basis of the ongoing development of an ISO standard for feature structures.