Pre-standard DIN SPEC 4002-102, Publication date: 2011-05 Properties and their scopes for product data exchange - Part 102: Units and quantities on www.DINsml.net

Standard DIN 4002-16, Publication date: 2011-06 Properties and their scopes for product data exchange - Part 16: Definition of the content and syntax of attributes for unit and quantity entities

Pre-standard DIN SPEC 4002-8, Publication date: 2010-11 Properties and their scopes for product data exchange - Part 8: Rules for designing application classes