02	Proprietary	
04	Börsenverein Verkehrsnummer	
05	German ISBN Agency publisher identifier	
06	GLN	GS1 global location number (formerly EAN location number)
07	SAN	Book trade Standard Address Number - US, UK etc
12	Distributeurscode Boekenbank	Flemish supplier code
13	Fondscode Boekenbank	Flemish publisher code