The figure above illustrates one of the most fundamental concepts of the VEC – the separation of a part and its description. In the VEC a part (PartVersion) does not contain any information about the part, except its PDM Information (PartNumber, PartVersion…). All the information about the technical properties of a part is expressed by a subclass of PartOrUsageRelatedSpecifications (e.g. a WireSpecification). The specifications itsselfes are contained in a DocumentVersion.
This approach enables the VEC to address two scenarios properly: