--- /dev/null
+L0 = <http://www.simantics.org/Layer0-1.1>
+DIA = <http://www.simantics.org/Diagram-2.2>
+
+DIARegions = <http://www.simantics.org/DistrictDiagramRegions-1.0> : L0.Ontology
+ @L0.new
+ L0.HasResourceClass "org.simantics.district.region.ontology.DiagramRegionsResource"
+
+DIARegions.Region <T L0.Entity
+
+DIARegions.Region.area <R L0.HasProperty
+
+DIARegions.hasRegion <R L0.IsWeaklyRelatedTo
+ L0.InverseOf DIARegions.regionOf <R L0.IsWeaklyRelatedTo
+ L0.HasDomain DIA.Diagram