This code was deprecated in 2000 because there were separate language codes for each individual language represented (Serbian, Croatian, and then Bosnian was added). It was published in a revision of ISO 639-1, but never was included in ISO 639-2. It is considered a macrolanguage (general name for a cluster of closely related individual languages) in ISO 639-3. Its deprecated status was reaffirmed by the ISO 639 JAC in 2005.