BIBFRAME does not require 3 character language codes. URIs are available for ISO 639-1 (2-character codes) and 639-2 (3-character codes). URIs are in the works for ISO 639-3 (a larger list of languages which also encompasses much of 639-2). See: id.loc.gov/vocabulary/iso639-1 id.loc.gov/vocabulary/iso639-2 It is neutral on which code list you use. Any examples that show 3-character codes may be transformations from MARC language codes, which are equivalent to the ISO 639-2/B list. Note that there are a limited number of languages that have 2-character codes; BCP47 (http://tools.ietf.org/html/bcp47) specifies how to combine the various language code lists. Rebecca Rebecca Squire Guenther Library of Congress Network Development & MARC Standards Office [log in to unmask] On Jun 30, 2014, at 3:53 PM, Stuart Yeates wrote: > On 07/01/2014 05:41 AM, Mark K. Ehlert wrote: >> Stuart Yeates <[log in to unmask] <mailto:[log in to unmask]>> >> wrote: >> >> My biggest issue (that's not covered in the doc, but which I've >> already fed to the doc's authors) is that BIBFRAME mandates >> three-letter language codes, where available, while core RDA >> mandates two-letter language codes, where available. > > Sorry, there are at least two separate errors in that. > > Correction: Every example I've ever seen using BIBFRAME and language codes uses three-letter codes without any discussion of the interoperability implications with every other thing in the RDF universe that I've seen that uses two letter codes. > > cheers > stuart > >> To my knowledge, RDA has no such instruction. There is RDA 7.13.2 >> (Script), where we're told to "expression the language content of the >> resource using one or more of the terms from ISO 15924..." (mentioned >> also under 0.12). >> >> There's also LC-PCC PS 7.12.1.3, which points to the MARC language code >> list for terms rather than codes: >> <http://access.rdatoolkit.org/document.php?id=lcpschp7&target=lcps7-145#lcps7-145>