Plant_item Hierarchy
Plant_item is satisfied by product_definition
・product_definition_context.name (from a_c_e)
..'physical definition'
..'functional definition'
..'physical occurrence'
..'functional occurrence'
・product_context.frame_of_ref.application = 'plant spatial configuration'
piping_component -> piping_component_definition
Piping Components
Mapping of Piping Components
・May represent either a single component or a family of components
・Single component is a product_definition
・Family of components is a piping-component_class
..Subtype of group and charocterized_object
..Intended to group a class of piping components according to arange of common parameter values
・Class subtypes of group exist for piping components one level underneath fitting, pipe and valve - piping_component_definition shall use these classes
