Components (Objects Parts)
Definition:
Components are «Constituent parts of a larger object. A component differs from an item in that the item can stand alone as an independent work but the component typically cannot or does not stand alone. Examples are a panel of a polyptych or a discrete architectural component such as a dome» (Getty AAT).
For the Turin 1911 purpose, Components belong to a single Built Environment Object.
Definition Source:
Getty AAT