ISO 639

From Wikipedia, the free encyclopedia - View original article

 
Jump to: navigation, search

ISO 639 is a set of standards by the International Organization for Standardization that is concerned with representation of names for language and language groups.

It was also the name of the original standard, approved in 1967 (as ISO 639/R)[1] and withdrawn in 2002.[2] The ISO 639 set consists of six parts.

The six parts of the standard[edit]

StandardName (Codes for the representation of names of languages – ...)First editionCurrentNo. in list
ISO 639-1Part 1: Alpha-2 code1967 (as ISO 639)2002184
ISO 639-2Part 2: Alpha-3 code19981998>450
ISO 639-3Part 3: Alpha-3 code for comprehensive coverage of languages200720077704 + local range
ISO 639-4Part 4: Implementation guidelines and general principles for language coding2010-07-162010-07-16(not a list)
ISO 639-5Part 5: Alpha-3 code for language families and groups2008-05-152008-05-15114
ISO 639-6Part 6: Alpha-4 representation for comprehensive coverage of language variants2009-11-172009-11-1721,000+

Each part of the standard is maintained by a maintenance agency, which adds codes and changes the status of codes when needed.

Characteristics of individual codes[edit]

Scopes:

Types (for individual languages):

Bibliographic and terminology codes

Relations between the parts[edit]

The first four columns contain codes for a representative of a specific type of relation between the parts of ISO 639. E.g. there are four elements that have a code in part 1, have a B/T code, and are macrolanguages per part 3. One representative of these four elements is "Persian" [fas].

ISO 639-1ISO 639-2ISO 639-3ISO 639-5#Description of example
enengeng(-)132185 in Part 1, subtract all special cases for Part 1 codes, 185-2-25-17-4-2-1-1-1=132
nbnobnob(-)2individual language, belongs to macrolanguage (nor), same code in Part 2 and has a code in Part 1. The two codes are: nob, non
araraara (M)(-)25Part 3 macro, 55 macro total, subtract special cases, 55-24-4-1-1=25
deger/deu (B/T)deu(-)1522 elements where B and T differ. Subtract special cases, 22-1-4-2=15.
cscze/ces (B/T)ces(-)1Element with differing B/T code and the letters from the Part 1 code are not the first two letters of the T code.
faper/fas (B/T)fas (M)(-)4Part 3 macro; the four T codes are: fas, msa, sqi, zho
hrscr/hrv (B/T)hrv(-)2Part 2 B deprecated, the two T codes are: hrv, srp. Deprecated 2008-06-28.
no ("M")nor ("M")nor (M)(-)1Part 3 macro and containing languages have codes in Part 1, nor: non, nob; no: nn, nb
bhbih(-) ?1Bihari (bih) is marked as collective despite having an ISO 639-1 code which should only be for individual languages. The reason is that some individual Bihari languages received an ISO 639-2 code, which makes Bihari a language family for the purposes of ISO 639-2, but a single language for the purposes of ISO 639-1. The single are: bho, mai, mag
sh(-)hbs (M)(-)1Part 3 macro, ISO 639-1 code deprecated, no part 2 code
(bh)bhobho(-)3individual language code in Part 2 + 3, belongs not to a macrolanguage, in Part 1 covered by a code which has equivalent in Part 2 which is a collective. The three codes are: bho, mai, mag
(bh)(bih)sck(-)individual language no code in Part 2, belongs not to a macrolanguage, in Part 1 covered by a code which has equivalent in Part 2 which is a collective.
(-)carcarcarindividual language in Part 2 and Part 3, but also included in Part 5 as a family[8][9]
(-)astast(-)individual language in Part 2 and Part 3, no code in Part 1
(-)balbal (M)(-)24individual language in Part 2 and macro in Part 3, no code in Part 1
(-)mismis ?1special code: uncoded language
(-)mulmul ?1special code: multilingual content
(-)undund ?1special code: undetermined
(-)zxxzxxhf ?1special code: added 2006-01-11 to declare the absence of linguistic information
(-)qaaqaa ?520reserved for local use, range is qaa ... qtz
(-)aus(-)ausregular group in Part 2
(-)afa(-)afaIn Part 2 a rest group, i.e. same code but different languages included. In Part 2 "afa" refers to an Afro-Asiatic language that does not have an individual-language identifier in Part 2, and that does not fall into the rest groups "ber - Berber (Other)", "cus - Cushitic (Other)", or "sem - Semitic (Other)", all of which are Afro-Asiatic language groups.
(ar)(ara "M")arb(-)individual language, belongs to macrolanguage (ara), in Part 2 covered by the macrolanguage code, in Part 1 also covered
(-)(nic "R")aaa(-)in Part 2 best covered by a rest group, "Niger-Kodofanian (Other)"
(-)(-)(-)sqjgroup not coded in Part 2

Code space[edit]

Alpha-2 code space[edit]

"Alpha-2" codes (for codes composed of 2 letters of the ISO basic Latin alphabet) are used in ISO 639-1. When codes for a wider range of languages were desired, more than 2 letter combinations could cover (a maximum of 262 = 676), ISO 639-2 was developed using Alpha-3 codes (though the latter was formally published first).[citation needed]

Alpha-3 code space[edit]

"Alpha-3" codes (for codes composed of 3 letters of the ISO basic Latin alphabet) are used in ISO 639-2, ISO 639-3, and ISO 639-5. The number of languages and language groups that can be so represented is 263 = 17,576.

The common use of Alpha-3 codes by three parts of ISO 639 requires some coordination within a larger system.

Part 2 defines four special codes mul, und, mis, zxx, a reserved range qaa-qtz (20 × 26 = 520 codes) and has 23 double entries (the B/T codes). This sums up to 520 + 23 + 4 = 547 codes that cannot be used in part 3 to represent languages or in part 5 to represent language families or groups. The remainder is 17,576 – 547 = 17,029.

There are somewhere around six or seven thousand languages on Earth today.[10] So those 17,029 codes are adequate to assign a unique code to each language, although some languages may end up with arbitrary codes that sound nothing like the traditional name(s) of that language.

Alpha-4 code space[edit]

"Alpha-4" codes (for codes composed of 4 letters of the ISO basic Latin alphabet) is proposed to be used in ISO 639-6. The upper limit for the number of languages and dialects that can be represented is 264 = 456,976.

See also[edit]

Notes and references[edit]

  1. ^ "ISO/R 639:1967". Iso.org. 1988-03-01. Retrieved 2012-08-05. 
  2. ^ "ISO 639:1988". Iso.org. Retrieved 2012-08-05. 
  3. ^ "ISO 639 code tables". Sil.org. Retrieved 2012-08-05. 
  4. ^ "ISO 639 code tables". Sil.org. Retrieved 2012-08-05. 
  5. ^ "ISO 639 code tables". Sil.org. Retrieved 2012-08-05. 
  6. ^ "ISO 639 code tables". Sil.org. Retrieved 2012-08-05. 
  7. ^ "ISO 639 code tables". Sil.org. Retrieved 2012-08-05. 
  8. ^ "ISO 639 code sets". Sil.org. Retrieved 2012-08-05. 
  9. ^ "ISO 639-5 Identifier : Codes for the representation of names of languages (ISO 639-5 Registration Authority - Library of Congress)". Loc.gov:8081. 2008-12-23. Retrieved 2012-08-05. 
  10. ^ "Statistical Summaries". Ethnologue. Retrieved 2012-08-05. 

External links[edit]