Example:
An instrument is contained in an enclosure, a pump contains an impeller, a device is contained by a volume of inert gas, a pipeline contains a pipeline inspection gauge (pig), a tank contains fluid, a building contains rooms.
Iof usage note:
This relation is intended to be used where an object x is located inside another object y, without implying that x is a part of y.
While a 'location' cannot be a part of a 'physical object' or vice versa, they may be contained by each other.
