The element <alteredFromPart> provides one or several parts from which the defined part has been modified. The altered from parts can be used on condition that a modification has been performed. The description of the modification can be provided.The altered from part can be identified by:− using the part number and manufacturer code (allowing then to refer to the part common information repository data module, if it is implemented) or− using the reference to the catalog sequence number where the part is described