Entity = getResourceOrNull(graph, URIs.Entity);
Entity_ClusterConstraint = getResourceOrNull(graph, URIs.Entity_ClusterConstraint);
Entity_PropertyConstraint = getResourceOrNull(graph, URIs.Entity_PropertyConstraint);
Entity_RelationConstraint = getResourceOrNull(graph, URIs.Entity_RelationConstraint);
Entity_URIConstraint = getResourceOrNull(graph, URIs.Entity_URIConstraint);
Entity_ValueConstraint = getResourceOrNull(graph, URIs.Entity_ValueConstraint);
Entity = getResourceOrNull(graph, URIs.Entity);
Entity_ClusterConstraint = getResourceOrNull(graph, URIs.Entity_ClusterConstraint);
Entity_PropertyConstraint = getResourceOrNull(graph, URIs.Entity_PropertyConstraint);
Entity_RelationConstraint = getResourceOrNull(graph, URIs.Entity_RelationConstraint);
Entity_URIConstraint = getResourceOrNull(graph, URIs.Entity_URIConstraint);
Entity_ValueConstraint = getResourceOrNull(graph, URIs.Entity_ValueConstraint);