A property holder with self-referential subproperty.
Ontology(<http://nomagic.com/ontology/example-case/case-11> Declaration( ObjectProperty(:contains) ) Declaration( ObjectProperty(:holds) ) AnnotationAssertion(rdfs:label :contains "contains"@en) SubObjectPropertyOf(:contains :holds) AnnotationAssertion(rdfs:label :holds "holds"@en) )
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