2013DIN 4002-4:2013 Properties and their scopes for product data exchange - Part 4: Terminological rules for attributes for entities
2007DIN 4002-4:2007 Properties and their scopes for product data exchange - Part 4: Terminological rules for attributes for entities
2003DIN V 4002-4:2003 Article characteristics and reference hierarchy for the exchange of product datas - Part 4: Terminological rules for the development of characteristics, objects and classes