Product_breakdown_arm
short long

e	Breakdown
e	Breakdown_context
e	Breakdown_element
e	Breakdown_element_definition
e	Breakdown_element_realization
d	Breakdown_element_realization_property_assignment_select
e	Breakdown_element_usage
e	Breakdown_element_version
d	Breakdown_item
e	Breakdown_of
e	Breakdown_version
e	Product_definition_element_relationship
d	Product_item