diff --git a/ontology/saref4auto.ttl b/ontology/saref4auto.ttl
index 4d8fe1290d8fe0a327c4fc7cae759c8d8abffe54..3f53be0156a95acef99c2041a15641d4ff630e97 100644
--- a/ontology/saref4auto.ttl
+++ b/ontology/saref4auto.ttl
@@ -363,13 +363,6 @@ vann:preferredNamespaceUri rdf:type owl:AnnotationProperty .
                   rdfs:label "AutomotiveObject"@en .
 
 
-###  https://saref.etsi.org/saref4auto/CardinalityUnit
-:CardinalityUnit rdf:type owl:Class ;
-                 rdfs:subClassOf saref:UnitOfMeasure ;
-                 rdfs:comment "unit of measure of size"@en ;
-                 rdfs:label "cardinality unit"@en .
-
-
 ###  https://saref.etsi.org/saref4auto/Confidence
 :Confidence rdf:type owl:Class ;
             rdfs:subClassOf [ rdf:type owl:Restriction ;
@@ -839,13 +832,6 @@ vann:preferredNamespaceUri rdf:type owl:AnnotationProperty .
                  rdfs:label "SpeedConfidence"@en .
 
 
-###  https://saref.etsi.org/saref4auto/SpeedUnit
-:SpeedUnit rdf:type owl:Class ;
-           rdfs:subClassOf saref:UnitOfMeasure ;
-           rdfs:comment "unit of measure of speed"@en ;
-           rdfs:label "speed unit"@en .
-
-
 ###  https://saref.etsi.org/saref4auto/StartPoint
 :StartPoint rdf:type owl:Class ;
             rdfs:subClassOf :Point ;