diff --git a/ontology/saref4envi.ttl b/ontology/saref4envi.ttl
index 84946fde0ce41cd8e4c6a2614832931385c6c360..25c78754e8c66f2f23fb84f04f4ef0ba1147cd38 100644
--- a/ontology/saref4envi.ttl
+++ b/ontology/saref4envi.ttl
@@ -289,13 +289,6 @@ saref:hasValue rdf:type owl:DatatypeProperty ;
           rdfs:label "has flash"@en .
 
 
-###  https://saref.etsi.org/saref4envi/hasIdentifier
-:hasIdentifier rdf:type owl:DatatypeProperty ;
-               rdfs:range xsd:string ;
-               rdfs:comment "A relationship providing the identifier of an entity (e.g., digital representation)"@en ;
-               rdfs:label "has identifier"@en .
-
-
 ###  https://saref.etsi.org/saref4envi/hasProjectionAngle
 :hasProjectionAngle rdf:type owl:DatatypeProperty ,
                              owl:FunctionalProperty ;
@@ -604,10 +597,6 @@ saref:UnitOfMeasure rdf:type owl:Class ;
                                          owl:onProperty :hasCreationDate ;
                                          owl:allValuesFrom xsd:dateTime
                                        ] ,
-                                       [ rdf:type owl:Restriction ;
-                                         owl:onProperty :hasIdentifier ;
-                                         owl:allValuesFrom xsd:string
-                                       ] ,
                                        [ rdf:type owl:Restriction ;
                                          owl:onProperty :hasTag ;
                                          owl:allValuesFrom xsd:string
@@ -618,9 +607,8 @@ saref:UnitOfMeasure rdf:type owl:Class ;
                                          owl:onDataRange xsd:dateTime
                                        ] ,
                                        [ rdf:type owl:Restriction ;
-                                         owl:onProperty :hasIdentifier ;
-                                         owl:maxQualifiedCardinality "1"^^xsd:nonNegativeInteger ;
-                                         owl:onDataRange xsd:string
+                                         owl:onProperty saref:hasIdentifier ;
+                                         owl:maxCardinality "1"^^xsd:nonNegativeInteger
                                        ] ;
                        owl:disjointWith :Geometry ,
                                         :Light ;