diff --git a/ontology/saref4wear.ttl b/ontology/saref4wear.ttl
index b7625cc62fe907591f765fb10ac451667da45d57..9508c078b9825009bd3e395dbdf72fdab2a1c8c8 100644
--- a/ontology/saref4wear.ttl
+++ b/ontology/saref4wear.ttl
@@ -629,7 +629,8 @@ s4city:Facility rdf:type owl:Class ;
 
 ###  https://saref.etsi.org/saref4wear/ActionFunction
 s4wear:ActionFunction rdf:type owl:Class ;
-                      rdfs:subClassOf saref:Function .
+                      rdfs:subClassOf saref:Function ;
+                      rdfs:label "Action function"@en .
 
 
 ###  https://saref.etsi.org/saref4wear/ActuableObject
@@ -650,12 +651,14 @@ s4wear:Biometric rdf:type owl:Class ;
 
 ###  https://saref.etsi.org/saref4wear/CommunicationFunction
 s4wear:CommunicationFunction rdf:type owl:Class ;
-                             rdfs:subClassOf saref:Function .
+                             rdfs:subClassOf saref:Function ;
+                             rdfs:label "Communication function"@en .
 
 
 ###  https://saref.etsi.org/saref4wear/ControlFunction
 s4wear:ControlFunction rdf:type owl:Class ;
-                       rdfs:subClassOf saref:Function .
+                       rdfs:subClassOf saref:Function ;
+                       rdfs:label "Control function"@en .
 
 
 ###  https://saref.etsi.org/saref4wear/ElectricalSafety
@@ -759,7 +762,8 @@ s4wear:PowerSupply rdf:type owl:Class ;
 
 ###  https://saref.etsi.org/saref4wear/Software
 s4wear:Software rdf:type owl:Class ;
-                rdfs:subClassOf saref:FeatureOfInterest .
+                rdfs:subClassOf saref:FeatureOfInterest ;
+                rdfs:label "Software"@en .
 
 
 ###  https://saref.etsi.org/saref4wear/TextileBasedDevice