SpaceCollection improvement

[zhluktenko]

A new subclass of Collection interface to group any kind of space.
Inherits all Collection components, "includes" relation has Space class as a target, multiplicity is 0-Infinity.

REC3 had SpaceCollection which is motivation in itself.
There is no equivalent in REC4. The closest REC4 classes are:

• A zone is not free enough, e.g. as it can not group rooms from multiple levels.
• “Premises” collection has a different semantical meaning and would be misleading.
• Area is only a quantity, not a geometry or group of spaces and/or geometries.

There are several practical cases where spaces need to be grouped, e.g. to keep track of the heated, cooled, rentable, or high-security part of a building. The need spans maintenance, administration technical configuration, and tenant experience.

Display name: SpaceCollection
DTMI: dtmi:org:w3id:rec:SpaceCollection;1