Files available here were automatically produced from the official registry maintained by IANA. The current version of the registry is .

• Official format
• As text files (one line per record, fields separated by tabulations, the subtag is the first field, the addition date the second):
  • List of languages
  • List of scripts
  • List of regions (including countries)
  • List of variants (orthography, local dialects)
  • List of grand-fathered (tags which would otherwise be illegal but are maintained for compatibility, because they were previously used)
  • List of redundants (subtags redundant with other subtags)
• As XML :
  • According to this schema (written in RelaxNG): registry in XML, Stéphane Bortzmeyer's version
• As SQL. Since SQL is not really portable, there are several versions :
  • For PostgreSQL (create the database with this schema) : registry in SQL,
  • For SQLite (create the database with this schema) : registry in SQL,