Where two ISO 639-2 codes are given in the table, the one with the asterisk is the
bibliographic code (B code) and the other is the terminological code (T code). Entries in the
Scope column distinguish: • individual language; • collections of languages connected, for example
genetically or by region; •
macrolanguages. The
Type column distinguishes: • Living (natural languages in current use); •
Historical (distinct from their modern form); •
Extinct in recent times; •
Constructed. for individual languages, and • Genetic; • Genetic-like; • Geographic (for regional language groups). for collectives. The differences between genetic and genetic-like are vague, but usually the former comprises more individual languages than the latter, while the latter comprises more language families than the former. The standard includes some codes for special situations: • mis, for "uncoded languages"; • mul, for "multiple languages"; • qaa–qtz, a range reserved for local use; • und, for "undetermined"; • zxx, for "no linguistic content; not applicable". • Synonyms for terminology applications (ISO 639-2/T) and for *bibliographic applications (ISO 639-2/B) == See also ==