Place Names Ontologies - Advances in Cartography and GIScience - page 341

Figure 6: An example of the Antisymmetric relationship.
5.1.6 Reflexive relationship
Reflexive relationship is defined if object A has relationship to itself (see
Figure 7 ) .
Example: River (Sava) is part of River (Sava) and relationship is reflexive.
Figure 7 : An example of the Reflexive relationship.
5.1.7 Irreflexive relationship
Irreflexive relationship is defined if object A can never have this relation-
ship to itself (see Figure 8 ) .