"2008-01-14"^^ . . . "A language of the resource."@en . "Language"@en . "Recommended practice is to use either a non-literal value representing a language from a controlled vocabulary such as ISO 639-2 or ISO 639-3, or a literal value consisting of an IETF Best Current Practice 47 [[IETF-BCP47](https://tools.ietf.org/html/bcp47)] language tag."@en . . "Used to link a bibliographic resource to the language used to express it."@en . .