Wiktionary:Unresolved issues/Unattested identifiers

This started out concerning ISO 639 language codes which weren't found to be used in natural language (and thus not "attestable"). Depending on the view, however, this class could include ISO 15924 script codes, chemical codes, and possibly even ISBN numbers.

Previous discussions

• Wiktionary:RFV#jv
• Wiktionary:RFV#ve
• Wiktionary:Beer parlour archive/2010/February#ISO codes
• Wiktionary:BP#Straw Poll: Inclusion of unattested identifiers
• Wiktionary:Votes/2010-03/All ISO 639 codes to meet CFI as Translingual entries