The organization of documents within the LANGDEV Project is based heavily on the IETF language tags.
The LANGDEV Project defines a number of IETF-compliant subtags for use with LANGDEV languages.
The LANGDEV subtags have been chosen so as not to conflict with existing registrations; however, as they have not been registered, they should be preceded by the private-use
x subtag in practice.
For maximum clarity, it is recommended that IETF tags for LANGDEV languages consist of the following components, in order:
The primary language subtag
art, which denotes an artificial language
If the language is being written in a registered (non-LANGDEV) script, the corresponding script subtag
The private-use subtag
The (unregistered, non-depreciated) primary subtag for the language, as defined below
If the language is being written in an unregistered (LANGDEV) script, the corresponding script subtag
If the language tag should denote a particular defined variant, the corresponding variant subtag(s)
For example, the correct language subtag for Jastugay written using the Latin script would be
art-Latn-x-jst, and the correct language subtag for Classical Sevensi written using Ancient Sevensi Runes would be
Processors which wish to support LANGDEV languages should interpret any tag which matches this sequence as a LANGDEV language tag.