diff --git a/ontology/saref4ehaw.ttl b/ontology/saref4ehaw.ttl
index 919d9c59f98651975425b18847d5fcc3cd1bb545..305474a0be0defda885dcf7349a58c41583a73cd 100644
--- a/ontology/saref4ehaw.ttl
+++ b/ontology/saref4ehaw.ttl
@@ -57,6 +57,8 @@ For embedded semantic analytics purposes, SAREF4EHAW shall behas been designed u
                                  owl:versionIRI <https://saref.etsi.org/s4ehaw/v0.1.2/s4ehaw/> ;
                                  
                                  owl:imports <https://saref.etsi.org/saref/core/> ;
+
+                                 owl:imports <https://saref.etsi.org/saref4envi/> ;
                                  
                                  dcterms:publisher <https://www.etsi.org/> ;
 
@@ -1883,13 +1885,6 @@ s4ehaw:HealthWearable rdf:type owl:Class ;
                      owl:equivalentClass s4wear:Wearable .
 
 
-
-###  https://saref.etsi.org/saref/core/Function
-
-saref:Function rdf:type owl:Class .
-
-
-
 ###  https://saref.etsi.org/s4ehaw/HealthSensor
 
 s4ehaw:HealthSensor rdf:type owl:Class ;
@@ -1902,22 +1897,6 @@ s4ehaw:HealthSensor rdf:type owl:Class ;
 
 
 
-###  https://saref.etsi.org/saref4envi/FrequencyMeasurement
-
-s4envi:FrequencyMeasurement rdf:type owl:Class ;
-                            
-                            rdfs:subClassOf saref:Measurement .
-
-
-
-### https://saref.etsi.org/saref/core/PowerUnit
-
-saref:PowerUnit rdfs:subClassOf saref:PressureUnit .
-
-
-
-
-
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 #    Individuals