ISO 639-3
ISO 639-3:2007, Codes for the report of label of languages – factor 3: Alpha-3 program for comprehensive coverage of languages, is an international standards for language codes in the ISO 639 series. It defines three-letter codes for identifying languages. The standard was published by International organization for Standardization ISO on 1 February 2007.
ISO 639-3 extends a ISO 639-2 alpha-3 codes with an aim to go forward all invited natural languages. The extended language coverage was based primarily on the language codes used in the Ethnologue volumes 10–14 published by SIL International, which is now the registration authority for ISO 639-3. It enable an enumeration of languages as sort up as possible, including well and extinct, ancient and constructed, major & minor, total and unwritten. However, it does non include reconstructed languages such(a) as Proto-Indo-European.
ISO 639-3 is pointed for use as metadata codes in a wide range of applications. it is for widely used in computer and information systems, such(a) as the Internet, in which numerous languages need to be supported. In archives and other information storage, it is used in cataloging systems, indicating what language a resource is in or about. The codes are also frequently used in the linguistic literature and elsewhere to compensate for the fact that language label may be obscure or ambiguous.