diff --git a/ontology/saref4agri.ttl b/ontology/saref4agri.ttl
index 1b30f968585eba7f0053b5c933feb834ef63d3cc..8ba0d752071755c76184290149f457a9942744a8 100644
--- a/ontology/saref4agri.ttl
+++ b/ontology/saref4agri.ttl
@@ -268,14 +268,6 @@ s4agri:hasDeploymentPeriod rdf:type owl:ObjectProperty ;
   rdfs:label "has deployment period"@en .
 
 
-###  https://saref.etsi.org/saref4agri/hasID
-s4agri:hasID rdf:type owl:ObjectProperty ;
-  rdfs:subPropertyOf owl:topObjectProperty ;
-  rdfs:range s4agri:ID ;
-  rdfs:comment "A relation to express the unique identifier of an animal."@en ;
-  rdfs:label "has id"@en .
-
-
 ###  https://saref.etsi.org/saref4agri/hasMember
 s4agri:hasMember rdf:type owl:ObjectProperty ;
       owl:inverseOf s4agri:isMemberOf ;
@@ -618,9 +610,9 @@ s4agri:Animal rdf:type owl:Class ;
       owl:someValuesFrom s4agri:AnimalGroup
     ] ,
     [ rdf:type owl:Restriction ;
-      owl:onProperty s4agri:hasID ;
+      owl:onProperty s4agri:hasIdentifier ;
       owl:maxQualifiedCardinality "1"^^xsd:nonNegativeInteger ;
-      owl:onClass s4agri:ID
+      owl:onDataRange xsd:string
     ] ,
     [ rdf:type owl:Restriction ;
       owl:onProperty s4agri:hasBirthDate ;
@@ -782,12 +774,6 @@ s4agri:Farmer rdf:type owl:Class ;
   rdfs:label "Farmer"@en .
 
 
-###  https://saref.etsi.org/saref4agri/ID
-s4agri:ID rdf:type owl:Class ;
-  rdfs:comment "ID"@en ;
-  rdfs:label "ID"@en .
-
-
 ###  https://saref.etsi.org/saref4agri/MilkingSensor
 s4agri:MilkingSensor rdf:type owl:Class ;
   rdfs:subClassOf saref:Sensor ;