ISO 10303-214:2010(E)
An Item is either a single object or a unit in a group of objects. It collects the information that is common to all versions of the object. An Item shall always be classified as 'part', 'tool', or 'raw material' using a Specific_item_classification. Additionally, if an Assembly_definition exists for at least one version of the Item, the Item shall be classified as being an 'assembly' using Specific_item_classification.
NOTE An Item may be either a single piece part, an assembly of arbitrary complexity, a raw material, or a tool.
EXAMPLE In the context of cars, an Item may be the car as a whole, the assembly of the engine, the car body, a fender, the side window glass, grease, or a stamping die.
The data associated with an Item are the following:
The description specifies additional information about the Item.
See item to multi_language_string for the application assertion.
The description need not be specified for a particular Item.
If present, there shall be exactly one object that defines the description for an Item.
The id specifies the identifier of the Item. For the id, an owner shall be specified by a Person_organization_assignment with role 'id owner'. The id shall be unique within the scope of the organization that is specified by the Person_organization_assignment with the role 'id owner'.
NOTE The scope of uniqueness is usually dependent on the form of implementation; it may be a physical file or a data base.
The name specifies the word or group of words used to refer to the Item.
See item to multi_language_string for the application assertion.
There shall be exactly one object that defines the name for an Item.
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