diff --git a/src/cco-modules/InformationEntityOntology.ttl b/src/cco-modules/InformationEntityOntology.ttl
index 2eddd12..9084270 100644
--- a/src/cco-modules/InformationEntityOntology.ttl
+++ b/src/cco-modules/InformationEntityOntology.ttl
@@ -373,8 +373,10 @@ cco:ont00001980 rdf:type owl:ObjectProperty ;
                  owl:propertyChainAxiom ( obo:BFO_0000178
                                           cco:ont00001982
                                         ) ;
+                 rdfs:domain cco:ont00000127 ;
+                 rdfs:range obo:BFO_0000001 ;
                  rdfs:label "describes condition"@en ;
-                 skos:definition "p describes_condition c iff p is an instance of a Performance Specification, and p has part d, and d is an instance of a Descriptive Information Content Entity, and p prescribes an entity s, and d describes c, and c is an entity that is causally relevant to s existing as prescribed by p."@en ;
+                 skos:definition "p describes_condition c iff p is an instance of a Performance Specification and c is an instance of Entity and p has part d, and d is an instance of a Descriptive Information Content Entity, and p prescribes an entity s, and d describes c, and c is an entity that is causally relevant to s existing as prescribed by p."@en ;
                  cco:ont00001760 "https://www.commoncoreontologies.org/InformationEntityOntology"^^xsd:anyURI .