diff --git a/ontology/saref4lift.ttl b/ontology/saref4lift.ttl
index 9eb9f5d27f04b742baa7d5e49dbd8979d0f39647..3c4a4cc98398810395cd0da1e9ff1cab235bf5a8 100644
--- a/ontology/saref4lift.ttl
+++ b/ontology/saref4lift.ttl
@@ -159,11 +159,13 @@ s4lift:isGroupedIn rdf:type owl:ObjectProperty ;
 
 ###  https://saref.etsi.org/saref4lift/receives
 s4lift:receives rdf:type owl:ObjectProperty ;
+          rdfs:label "receives"@en ;
           rdfs:range s4lift:BCSSignal .
 
 
 ###  https://saref.etsi.org/saref4lift/sendsCommand
 s4lift:sendsCommand rdf:type owl:ObjectProperty ;
+              rdfs:label "sends command"@en;
               rdfs:range saref:Command .
 
 
@@ -264,6 +266,7 @@ s4lift:hasMaintenanceCompany rdf:type owl:DatatypeProperty ;
 
 ###  https://saref.etsi.org/saref4lift/hasNetworkValue
 s4lift:hasNetworkValue rdf:type owl:DatatypeProperty ;
+              rdfs:label "has network value"@en ;
                  rdfs:domain s4lift:RegisteredNetworkOperator ;
                  rdfs:range xsd:string .
 
@@ -277,6 +280,7 @@ s4lift:hasOwner rdf:type owl:DatatypeProperty ;
 
 ###  https://saref.etsi.org/saref4lift/hasPositionValue
 s4lift:hasPositionValue rdf:type owl:DatatypeProperty ;
+          rdfs:label "has position value"@en ;
                   rdfs:domain s4lift:PositionSignal ;
                   rdfs:range xsd:integer .
 
@@ -299,12 +303,14 @@ s4lift:hasSecondaryEmergencyTelephoneNumber rdf:type owl:DatatypeProperty ;
 
 ###  https://saref.etsi.org/saref4lift/hasStatisticValue
 s4lift:hasStatisticValue rdf:type owl:DatatypeProperty ;
+                rdfs:label "has statistic value"@en ;
                    rdfs:domain s4lift:StatisticSignal ;
                    rdfs:range xsd:integer .
 
 
 ###  https://saref.etsi.org/saref4lift/hasStatusValue
 s4lift:hasStatusValue rdf:type owl:DatatypeProperty ;
+                rdfs:label "has status value"@en ;
                 rdfs:domain s4lift:StatusSignal ;
                 rdfs:range xsd:boolean .
 
@@ -653,6 +659,7 @@ s4lift:PositionSignal rdf:type owl:Class ;
 
 ###  https://saref.etsi.org/saref4lift/PowerSupplySignal
 s4lift:PowerSupplySignal rdf:type owl:Class ;
+                rdfs:label "Power supply signal"@en ;
                    rdfs:subClassOf s4lift:Signal .