diff --git a/ontology/saref4envi.ttl b/ontology/saref4envi.ttl
index 84946fde0ce41cd8e4c6a2614832931385c6c360..f85626b7d4dee2cde6dce58b1f3db159d5dc7669 100644
--- a/ontology/saref4envi.ttl
+++ b/ontology/saref4envi.ttl
@@ -109,11 +109,6 @@ saref:relatesToProperty rdf:type owl:ObjectProperty ;
                         rdfs:label "relates to property"@en .
 
 
-###  https://saref.etsi.org/saref4envi/affectsProperty
-:affectsProperty rdf:type owl:ObjectProperty ;
-                 rdfs:comment "A relation between an actuator with the property or properties it can act on"@en ;
-                 rdfs:label "affects property"@en .
-
 
 ###  https://saref.etsi.org/saref4envi/contains
 :contains rdf:type owl:ObjectProperty ;
@@ -478,17 +473,6 @@ saref:UnitOfMeasure rdf:type owl:Class ;
                     rdfs:label "Unit of measure"@en .
 
 
-###  https://saref.etsi.org/saref4envi/Actuator
-:Actuator rdf:type owl:Class ;
-          rdfs:subClassOf :Device ,
-                          [ rdf:type owl:Restriction ;
-                            owl:onProperty :affectsProperty ;
-                            owl:allValuesFrom saref:Property
-                          ] ;
-          rdfs:comment "Device that can act over at least one property."@en ;
-          rdfs:label "Actuator"@en .
-
-
 ###  https://saref.etsi.org/saref4envi/Color
 :Color rdf:type owl:Class ;
        owl:disjointWith :CommunicationInterface ,