[NUT-devel] questions about "Language" info packets

[Clemens Ladisch]

nut.txt says:
|   "Language"
|       ISO 639 and ISO 3166 for language/country code

Does "ISO 639" mean ISO 639-1 or ISO 639-2?
Are both codes required or allowed?  If yes, in what format?

|       something like "eng" (US English)

When using a three-letter code from ISO 639-2, should a nut writer use
the bibliographic or the terminology code?

Are two-letter codes allowed at all?

|       can be 0 if unknown

Does this mean that there is no Language entry, or that it is an emtpy
string, or that it is a string containing a zero byte, or that the
string is "0"?

|       and "multi" if several languages

ISO 639-2 already has "mul" for multiple languages.
Does this mean that both "mul" and "multi" are allowed?


Regards,
Clemens