diff --git a/ontology/saref4wear.ttl b/ontology/saref4wear.ttl
index 83134188763eacf75dd3c6795ba9dc3073bb89d0..52459e4f9d0658981f84b68262e9bdb68d824648 100644
--- a/ontology/saref4wear.ttl
+++ b/ontology/saref4wear.ttl
@@ -635,11 +635,6 @@ s4wear:BusinessEvents rdf:type owl:Class ;
                       rdfs:subClassOf s4city:Event .
 
 
-###  https://saref.etsi.org/saref4wear/Child
-s4wear:Child rdf:type owl:Class ;
-             rdfs:subClassOf s4wear:LivingOrganism .
-
-
 ###  https://saref.etsi.org/saref4wear/CommunicationFunction
 s4wear:CommunicationFunction rdf:type owl:Class ;
                              rdfs:subClassOf saref:Function .
@@ -730,11 +725,6 @@ s4wear:OnBodyWearable rdf:type owl:Class ;
                                       ] .
 
 
-###  https://saref.etsi.org/saref4wear/Parent
-s4wear:Parent rdf:type owl:Class ;
-              rdfs:subClassOf s4wear:LivingOrganism .
-
-
 ###  https://saref.etsi.org/saref4wear/PhysicalObject
 s4wear:PhysicalObject rdf:type owl:Class ;
                       rdfs:subClassOf geosp:Feature ,
@@ -761,11 +751,6 @@ s4wear:SportEvents rdf:type owl:Class ;
                    rdfs:subClassOf s4city:Event .
 
 
-###  https://saref.etsi.org/saref4wear/StaffMember
-s4wear:StaffMember rdf:type owl:Class ;
-                   rdfs:subClassOf s4wear:LivingOrganism .
-
-
 ###  https://saref.etsi.org/saref4wear/TextileBasedDevice
 s4wear:TextileBasedDevice rdf:type owl:Class ;
                           rdfs:subClassOf s4wear:TextileBasedWearable .