diff --git a/ontology/saref4ehaw.ttl b/ontology/saref4ehaw.ttl
index 34e0026f98de4b91821ab6c5c6678b78f896113b..af20f59518e43b1d01445cb34fb447f4840134be 100644
--- a/ontology/saref4ehaw.ttl
+++ b/ontology/saref4ehaw.ttl
@@ -7,7 +7,7 @@
 @prefix vann: <http://purl.org/vocab/vann/> .
 @prefix voaf: <http://purl.org/vocommons/voaf#> .
 @prefix saref: <https://saref.etsi.org/saref/core/> .
-@prefix s4ehaw: <https://saref.etsi.org/saref4ehaw/> .
+@prefix s4ehaw: <https://saref.etsi.org/core/v3.1.1/> .
 @prefix s4envi: <https://saref.etsi.org/saref4envi/> .
 @prefix s4wear: <https://saref.etsi.org/saref4wear/> .
 @prefix dcterms: <http://purl.org/dc/terms/> .
@@ -91,7 +91,7 @@ s4ehaw:followsUser rdf:type owl:ObjectProperty ;
                
                rdfs:range s4ehaw:Helper ;
                
-               rdfs:domain saref:User .
+               rdfs:domain s4ehaw:User .
 
 
 
@@ -1938,67 +1938,67 @@ s4wear:Wearable rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/Actuator
+###  https://saref.etsi.org/core/v3.1.1/Actuator
 
 saref:Actuator rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/Command
+###  https://saref.etsi.org/core/v3.1.1/Command
 
 saref:Command rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/Function
+###  https://saref.etsi.org/core/v3.1.1/Function
 
 saref:Function rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/FunctionRelated
+###  https://saref.etsi.org/core/v3.1.1/FunctionRelated
 
 saref:FunctionRelated rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/Measurement
+###  https://saref.etsi.org/core/v3.1.1/Measurement
 
 saref:Measurement rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/NotifyCommand
+###  https://saref.etsi.org/core/v3.1.1/NotifyCommand
 
 saref:NotifyCommand rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/Property
+###  https://saref.etsi.org/core/v3.1.1/Property
 
 saref:Property rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/Sensor
+###  https://saref.etsi.org/core/v3.1.1/Sensor
 
 saref:Sensor rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/Service
+###  https://saref.etsi.org/core/v3.1.1/Service
 
 saref:Service rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/Task
+###  https://saref.etsi.org/core/v3.1.1/Task
 
 saref:Task rdf:type owl:Class .
 
 
 
-###  https://saref.etsi.org/saref/core/UnitOfMeasure
+###  https://saref.etsi.org/core/v3.1.1/UnitOfMeasure
 
 saref:UnitOfMeasure rdf:type owl:Class .