A Product_specification_or_set is a Class_of_physical_individual that has instances of Individual_product as members.
A Product_specification_or_set is one of the possible meanings for Product_view_definition.
The nature of an Individual_product can be indicated by a classification relationship with a Product_specification_or_set.
A Product_specification_or_set can be one of the following:
EXPRESS specification:
*) ENTITY Product_specification_or_set SUPERTYPE OF (ONEOF ( Explicit_product_set, Specific_product_specification, Product_occurrence)) SUBTYPE OF ( Class_of_physical_individual, Product_view_definition); END_ENTITY; (*