This entity is for administrating the different types of ObjectRelations that can be used with the ObjectTree_entity.
== Database Structure
One complete ObjectRelationType can consist of either one or two rows in the table 'AB_OBJECTRELATIONTYPE', depending on whether the ObjectRelationType is double-sided or not. When there are two rows they share the same 'RELATION_TYPE' and the order of them is determined by the 'SIDE'.
The flag 'HIERARCHY' determines if the relation between to objects will be hierarchical.
== Entity Structure
In the entity, one row represents a "full" ObjectRelationType, so the database entries that make it up are already joined together.
NOTE: A "second side" of the ObjectRelationType is not mandatory, if it is not set, only one row in the database is needed. Such a relation type makes sense when a relation is the same regardless from which side you view it (e. g. acquaintance).
