diff --git a/CHANGELOG.md b/CHANGELOG.md
index fd38bd8fe..ce944da8e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,9 @@ and the versioning aims to respect [Semantic Versioning](http://semver.org/spec/
 ### Added
 - conceptual model (#1976)
 
+### Changed
+- has model(#2001)
+
 ## [2.6.0] - 2024-12-06
 ### Added
 - has aggregation type, has time stamp alignment (#1944)
diff --git a/src/ontology/oeo.omn b/src/ontology/oeo.omn
index 88f9eda76..541c8cccd 100644
--- a/src/ontology/oeo.omn
+++ b/src/ontology/oeo.omn
@@ -68,6 +68,9 @@ A supplementary module is the oeo-physical-axioms module, which contains general
     dct:license <http://creativecommons.org/publicdomain/zero/1.0/>,
     dct:title "Open Energy Ontology"
 
+AnnotationProperty: <http://purl.obolibrary.org/obo/IAO_0000233>
+
+    
 AnnotationProperty: dc:contributor
 
     
@@ -80,6 +83,12 @@ AnnotationProperty: dct:license
 AnnotationProperty: dct:title
 
     
+AnnotationProperty: rdfs:comment
+
+    
 Datatype: rdf:PlainLiteral
 
     
+Datatype: xsd:string
+
+