ISO/TS 10303-1293:2005 specifies the application module for AP239 part definition information, in particular: * representation of the data that identify parts and their versions; * representation of characterization views of a version of a part; * representation of parts, their versions, their definitions, and their management information, such as dates, that are assigned to them; * representation of alias identifications assigned to product data; * representation of the data that identify a product and the categories of products it belongs to; * representation of the data that designate a version of a product; * representation of characterization views of a product version; * representation of relationships between versions of products; * representation of assignments of an identifier to product data; * representation and classification of documents and document information that may apply to part definition information; * representation of properties of objects, their values and types, and classifications; * representation of information that records the identification of an existing or potential future artifact - an actual product whose properties can only be known by observation or by derivation from observations; * representation of interfaces between products; * representation of the life cycle phase of existing interfaces between actual products (as realized), and includes planned interfaces between planned products; * representation of relationships between requirements and items to which they are assigned, and between requirements and the items which are their source; * representation of the information that identify a requirement and versions of requirements; * representation of characterization views of a requirement version; * representation of relationships between requirements which are expressed as relationships between requirement view definitions; * representation of a type of state; * representation of state observed.