diff --git a/ontology/saref.ttl b/ontology/saref.ttl
index a0a1f86159550d5064e2049df76726da3aba26fa..3138a212317964af85b3a319cdd51ff4d97edb57 100644
--- a/ontology/saref.ttl
+++ b/ontology/saref.ttl
@@ -251,7 +251,7 @@ saref:hasTimestamp rdf:type owl:DatatypeProperty ;
 
 ###  https://saref.etsi.org/hasValue
 saref:hasValue rdf:type owl:DatatypeProperty ;
-               rdfs:comment "A relationship defining the value of a certain property, e.g., energy or power"@en ;
+               rdfs:comment "A relationship defining the value of a certain property, e.g., energy or power. Note that, even if numeric values are expected to enable reasoning, measurement values could use other datatypes."@en ;
                rdfs:label "has value"@en .
 
 
@@ -669,8 +669,7 @@ saref:Measurement rdf:type owl:Class ;
                                   ] ,
                                   [ rdf:type owl:Restriction ;
                                     owl:onProperty saref:hasValue ;
-                                    owl:qualifiedCardinality "1"^^xsd:nonNegativeInteger ;
-                                    owl:onDataRange xsd:float
+                                    owl:cardinality "1"^^xsd:nonNegativeInteger
                                   ] ;
                   rdfs:comment "Represents the measured value made over a property. It is also linked to the unit of measure in which the value is expressed and the timestamp of the measurement."@en ;
                   rdfs:label "Measurement"@en .