标准编号：ISO 639-3:2007
中文名称：语言名称代码表示法 第3部分：综合种类语言用Alpha-3代码
英文名称：Codes for the representation of names of languages — Part 3: Alpha-3 code for comprehensive coverage of languages
发布日期：2007-02
标准范围
This part of ISO 639 provides a code, published by the Registration Authority of ISO 639-3, consisting oflanguage code elements comprising three-letter language identifiers for the representation of languages. Thelanguage identifiers according to this part of ISO 639 were devised for use in a wide range of applications,especially in computer systems, where there is potential need to support a large number of the languages thatare known to have ever existed. Whereas ISO 639-1 and ISO 639-2 are intended to focus on the majorlanguages of the world that are most frequently represented in the total body of the world's literature, this partof ISO 639 attempts to provide as complete an enumeration of languages as possible, including living, extinct,ancient and constructed languages, whether major or minor, written or unwritten. As a result, this part ofISO 639 deals with a very large number of lesser-known languages. Languages designed exclusively formachine use, such as computer-programming languages and reconstructed languages, are not included inthis code.Knowledge of the world's languages at any given time is never complete or perfect. Additional languageidentifiers may be created for this list when it becomes apparent that there is a linguistic variety that is deemedto be distinct from other languages in accordance with the definitions in Clause 3 and their elaboration inClause 4. In addition, the denotation of existing identifiers may be revised or identifiers may becomedeprecated when it becomes apparent that they do not accurately reflect actual language distinctions. In allsuch changes, careful consideration is given to minimize adverse effects on existing implementations.
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