DCM Z1: 377 Associated Language
General:
Prefer language codes over language terms, using codes from the MARC Code List for Languages (also available at: http://www.loc.gov/marc/languages/langhome.html) as the source for language codes. Use subfield $l (Language term) only to provide information not available in the MARC Code List for Languages. Encode multiple languages for a person or corporate body only if more than one language is used for publication, communication, etc.
Subfield $2 - Source of code:
Subfield $2 is not required when the MARC Code List for Languages is used as the language source code (second indicator value "#"). NACO institutions may supply an additional 377 field from another language code list by using second indicator value "7," with subfield $2 containing a code for a language source list taken from the list of MARC-registered language lists in Language Code and Term Source Codes (also available at: http://www.loc.gov/standards/sourcelist/language.html).
Example:
377 ## $a myn
377 #7 $a acr $2 iso639-3
[ISO 639-3 code for Achi (acr); assigned a collective code (myn) for Mayan languages in the MARC Code List for Languages.]
For more information on DCM Z1 Instructions, select: