diff --git a/ontology/saref4ehaw.ttl b/ontology/saref4ehaw.ttl
index fdeabca1f09d47ab1fa68f28a8071abe04d9d2ab..01bef357042b03c7cf8472a8f575afd0a46211c8 100644
--- a/ontology/saref4ehaw.ttl
+++ b/ontology/saref4ehaw.ttl
@@ -152,12 +152,12 @@ s4ehaw:hasComputingPower rdf:type owl:ObjectProperty ;
                          rdfs:label "has computing power"@en .
 
 
-###  https://saref.etsi.org/saref4ehaw/hasConstraint
-s4ehaw:hasConstraint rdf:type owl:ObjectProperty ;
+###  https://saref.etsi.org/saref4ehaw/hasDataConstraint
+s4ehaw:hasDataConstraint rdf:type owl:ObjectProperty ;
                      rdfs:domain s4ehaw:Data ;
-                     rdfs:range s4ehaw:Constraint ;
-                     rdfs:comment "Data has constraints (validity, operating, security...)."@en ;
-                     rdfs:label "has constraint"@en .
+                     rdfs:range s4ehaw:DataConstraint ;
+                     rdfs:comment "Data has data constraints (validity, operating, security...)."@en ;
+                     rdfs:label "has data constraint"@en .
 
 
 ###  https://saref.etsi.org/saref4ehaw/hasContact
@@ -941,10 +941,10 @@ s4ehaw:ComputingPower rdf:type owl:Class ;
                       rdfs:label "Computing power"@en .
 
 
-###  https://saref.etsi.org/saref4ehaw/Constraint
-s4ehaw:Constraint rdf:type owl:Class ;
+###  https://saref.etsi.org/saref4ehaw/DataConstraint
+s4ehaw:DataConstraint rdf:type owl:Class ;
                   rdfs:comment "The Data constraints, e.g. validity, operating, security..."@en ;
-                  rdfs:label "Constraint"@en .
+                  rdfs:label "Data constraint"@en .
 
 
 ###  https://saref.etsi.org/saref4ehaw/Contact
@@ -1056,7 +1056,7 @@ s4ehaw:Interface rdf:type owl:Class ;
 
 ###  https://saref.etsi.org/saref4ehaw/LegalConstraint
 s4ehaw:LegalConstraint rdf:type owl:Class ;
-                       rdfs:subClassOf s4ehaw:Constraint ;
+                       rdfs:subClassOf s4ehaw:DataConstraint ;
                        rdfs:comment "An empty container for describing the legal constraints a data can be submitted to, like e.g. anonymization."@en ;
                        rdfs:label "Legal constraint"@en .
 
@@ -1196,7 +1196,7 @@ s4ehaw:User rdf:type owl:Class ;
 
 ###  https://saref.etsi.org/saref4ehaw/ValidityConstraint
 s4ehaw:ValidityConstraint rdf:type owl:Class ;
-                          rdfs:subClassOf s4ehaw:Constraint ;
+                          rdfs:subClassOf s4ehaw:DataConstraint ;
                           rdfs:comment "Data may have validity constraint such as allowable value range."@en ;
                           rdfs:label "Validity constraint"@en .