According to the council logs that approved GLEP 68 (https://projects.gentoo.org/council/meeting-logs/20160410.txt): <ulm> right, there was some minor last-minute issue about the lang attribute <ulm> the question is if we leave it at ISO-639-1, i.e. two-letter language code [...] <dilfridge> so consensus is keep it at 2 characters <ulm> yes Furthermore, the xml-schema in the GLEP explicitly cites ISO 639-1 language code as valid values for the lang attribute (https://gitweb.gentoo.org/data/xml-schema.git/tree/metadata.xsd#n295). The GLEP mentions the common usage of ISO 639-1 but does not explicitly state that only values in the ISO 639-1 format are valid for the lang attribute. Reproducible: Always
mgorny: any input?
I just went over the whole GLEP again. The section "Language identifiers" does not have this information but it is specified in section "Common attributes". Sorry about this. We'll need to patch metadata.dtd but there's nothing GLEP-wise.