points to ISO 639-3 for languages without shorter IANA codes. Dublin Core Metadata Initiative: DCMI Metadata Term for language, via IETF's (now superseded by ). Internet Assigned Numbers Authority (IANA) The W3C's internationalization effort recommends the use of the IANA Language Subtag Registry for selecting codes for languages. The IANA Language Subtag Registry depends on ISO 639-3 codes for languages which did not previously have codes in other parts of the ISO 639 standard. HTML5: via IETF's BCP 47. XML: via IETF's BCP 47. SVG: via IETF's BCP 47. MODS library codes: Incorporates IETF's (now superseded by ). Text Encoding Initiative (TEI): via IETF's BCP 47. Lexical Markup Framework: ISO specification for representation of machine-readable dictionaries. Unicode's Common locale data repository: Uses several hundred codes from ISO 639-3 not included in ISO 639-2. References Further reading External links ISO 639-3 Registration Authority FAQ at the United States Library of Congress website Pending ISO 639-3 applications Linguist List - List of Ancient and Extinct Languages explanation by Håvard Hjulstad ISO 639 2007 works Language identifiers de:ISO 639#ISO 639-3