ISO/TS 10303-1157:2005 specifies the application module for Class of product structure.
The following are within the scope of ISO/TS 10303-1157:2005:
existence of a class of product;
class of decomposition relationship, and the decomposition of a class of product into component classes of product;
class of connection relationship, and connection between classes of product;
class of usage of a product in a connection, and usage of a class of product in a class of connection;
class of containment relationship, and containment of a class of product by a class of container.