OWNER

The different levels in the hierarchy are maintained by an Owner-Member relationship. An EQUI will have ZONE as its owner, while a CYLI might well be one of the EQUI’s members. The owner is that element which is directly related to the current element at the next level up in the hierarchy, as shown in the diagram below:

The element on the upper level is the Owner of those elements directly below it, for example, the equipment (EQUI) owns the primitive (CYLI). The lower level elements are Members of the owning element, for example, the EQUI is a member of the ZONE.