OptionalconditionOptionaldriveHow its punches were driven, as the rows of its chains show it: in line across the tracks where one ram head drove them all, and staggered where each punch had a driver of its own. It is part of how the machine was built and so no part of its setting.
ReadonlyidA unique identifier for this object.
ReadonlytypeThe type discriminator for this object.
The machine that punched the copy. It stands for this production alone. Whether it is the one another copy was punched on is left to a statement of identity made about it elsewhere, which its id allows.
See
crm:E22 Human-Made Object