diff --git a/ontology/saref4ehaw.ttl b/ontology/saref4ehaw.ttl
index b492b3020b812a1714d474aac06b47932695de6a..4fa9f91a58cf3adc83a69ba3e909ec651168ee2a 100644
--- a/ontology/saref4ehaw.ttl
+++ b/ontology/saref4ehaw.ttl
@@ -8,13 +8,13 @@
 @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/s4ehaw/> .
+@prefix s4ehaw: <https://saref.etsi.org/saref4ehaw/> .
 @prefix s4envi: <https://saref.etsi.org/saref4envi/> .
-@prefix s4wear: <https://saref.etsi.org/s4wear/> .
+@prefix s4wear: <https://saref.etsi.org/saref4wear/> .
 @prefix dcterms: <http://purl.org/dc/terms/> .
-@base <https://saref.etsi.org/s4ehaw/> .
+@base <https://saref.etsi.org/saref4ehaw/> .
 
-<https://saref.etsi.org/s4ehaw/> rdf:type owl:Ontology ;
+<https://saref.etsi.org/saref4ehaw/> rdf:type owl:Ontology ;
                                  
                                  rdfs:label "SAREF4EHAW"@en ;
                                  
@@ -35,15 +35,15 @@ For embedded semantic analytics purposes, SAREF4EHAW shall behas been designed u
                                  
                                  dcterms:modified "do not set this"^^xsd:date ;
                                  
-                                 dcterms:created "start date of the STF 2019-01-01"^^xsd:date ;
-                                 
-                                 vann:preferredNamespacePrefix "s4ehaw" ;
+                                 dcterms:created "2019-01-01"^^xsd:date ;
                                  
                                  dcterms:title "SAREF4EHAW: an extension of SAREF for eHealth Ageing Well domain"@en ;
                                  
                                  owl:versionInfo "v1.1.1" ;
-                                 
-                                 vann:preferredNamespaceUri "https://saref.etsi.org/s4ehaw/" ;
+
+                                 vann:preferredNamespaceUri "https://saref.etsi.org/saref4ehaw/" ;
+				 
+                                 vann:preferredNamespacePrefix "s4ehaw" ;
                                  
                                  dcterms:creator <http://www-public.imtbs-tsp.eu/~girodgen/> ;