Open bwbohl opened 2 years ago
as discovered by @riedde in Bazga merge Edirom/Edirom-Online#172
actually the definition of @xml:lang
allows BCP47 language tags (see https://www.w3.org/International/articles/language-tags/), of which iso 639-1 is just a subset. A description of BCP47 can be found at https://en.wikipedia.org/wiki/IETF_language_tag
best source is the IANA registry: https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
to avoid providing a modified xml.xsd a schematron file could do the job
eventually we could just add all iso690 codes as allowed values