A thing which is contained by this thing.
The container membership properties (properties of the form , , ⁊·c) are all implicitly subproperties of this property, altho there is no formal requirement on applications to support this.
These properties are intended for use with [Containers](rdfs:Container), but may also be applied to other things.
In , this property is permitted to take literal values; it is neither formally an object property nor a data property.
For compatibility with Owl, and to match the most useful cases, this ontology defines it as an object property and disallows its use with literals.