diff --git a/ontology/saref4wear.ttl b/ontology/saref4wear.ttl
index 1851c15b704debda6681d700f3601b227d6c5576..7f7456d2d60f06cd3220638b53e02558500b3931 100644
--- a/ontology/saref4wear.ttl
+++ b/ontology/saref4wear.ttl
@@ -150,6 +150,61 @@ s4wear:monitors rdf:type owl:ObjectProperty ;
                 rdfs:range s4wear:Wearable .
 
 
+###  https://saref.etsi.org/saref#controlsProperty
+saref:controlsProperty rdf:type owl:ObjectProperty ;
+                       rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                       rdfs:label "controls property"@en .
+
+
+###  https://saref.etsi.org/saref#isControlledByDevice
+saref:isControlledByDevice rdf:type owl:ObjectProperty ;
+                           rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                           rdfs:label "is controlled by device"@en .
+
+
+###  https://saref.etsi.org/saref#isMeasuredByDevice
+saref:isMeasuredByDevice rdf:type owl:ObjectProperty ;
+                         rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                         rdfs:label "is measured by device"@en .
+
+
+###  https://saref.etsi.org/saref#isMeasuredIn
+saref:isMeasuredIn rdf:type owl:ObjectProperty ;
+                   rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                   rdfs:label "is measured in"@en .
+
+
+###  https://saref.etsi.org/saref#makesMeasurement
+saref:makesMeasurement rdf:type owl:ObjectProperty ;
+                       owl:inverseOf saref:measurementMadeBy ;
+                       rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                       rdfs:label "makes measurement"@en .
+
+
+###  https://saref.etsi.org/saref#measurementMadeBy
+saref:measurementMadeBy rdf:type owl:ObjectProperty ;
+                        rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                        rdfs:label "measurement made by"@en .
+
+
+###  https://saref.etsi.org/saref#measuresProperty
+saref:measuresProperty rdf:type owl:ObjectProperty ;
+                       rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                       rdfs:label "measures property"@en .
+
+
+###  https://saref.etsi.org/saref#relatesToMeasurement
+saref:relatesToMeasurement rdf:type owl:ObjectProperty ;
+                           rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                           rdfs:label "relates to measurement"@en .
+
+
+###  https://saref.etsi.org/saref#relatesToProperty
+saref:relatesToProperty rdf:type owl:ObjectProperty ;
+                        rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                        rdfs:label "relates to property"@en .
+
+
 #################################################################
 #    Data properties
 #################################################################
@@ -200,6 +255,18 @@ s4wear:wearerStatus rdf:type owl:DatatypeProperty ;
                     rdfs:range xsd:string .
 
 
+###  https://saref.etsi.org/saref#hasTimestamp
+saref:hasTimestamp rdf:type owl:DatatypeProperty ;
+                   rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                   rdfs:label "has timestamp"@en .
+
+
+###  https://saref.etsi.org/saref#hasValue
+saref:hasValue rdf:type owl:DatatypeProperty ;
+               rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+               rdfs:label "has value"@en .
+
+
 #################################################################
 #    Classes
 #################################################################
@@ -419,6 +486,67 @@ saref:Device rdf:type owl:Class ;
              rdfs:label "Device"@en .
 
 
+###  https://saref.etsi.org/saref#Measurement
+saref:Measurement rdf:type owl:Class ;
+                  rdfs:subClassOf [ rdf:type owl:Restriction ;
+                                    owl:onProperty saref:isMeasuredIn ;
+                                    owl:allValuesFrom saref:UnitOfMeasure
+                                  ] ,
+                                  [ rdf:type owl:Restriction ;
+                                    owl:onProperty saref:relatesToProperty ;
+                                    owl:allValuesFrom saref:Property
+                                  ] ,
+                                  [ rdf:type owl:Restriction ;
+                                    owl:onProperty saref:isMeasuredIn ;
+                                    owl:qualifiedCardinality "1"^^xsd:nonNegativeInteger ;
+                                    owl:onClass saref:UnitOfMeasure
+                                  ] ,
+                                  [ rdf:type owl:Restriction ;
+                                    owl:onProperty saref:relatesToProperty ;
+                                    owl:qualifiedCardinality "1"^^xsd:nonNegativeInteger ;
+                                    owl:onClass saref:Property
+                                  ] ,
+                                  [ rdf:type owl:Restriction ;
+                                    owl:onProperty saref:hasTimestamp ;
+                                    owl:allValuesFrom xsd:dateTime
+                                  ] ,
+                                  [ rdf:type owl:Restriction ;
+                                    owl:onProperty saref:hasValue ;
+                                    owl:cardinality "1"^^xsd:nonNegativeInteger
+                                  ] ,
+                                  [ rdf:type owl:Restriction ;
+                                    owl:onProperty saref:hasValue ;
+                                    owl:qualifiedCardinality "1"^^xsd:nonNegativeInteger ;
+                                    owl:onDataRange xsd:float
+                                  ] ;
+                  rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                  rdfs:label "Measurement"@en .
+
+
+###  https://saref.etsi.org/saref#Property
+saref:Property rdf:type owl:Class ;
+               rdfs:subClassOf [ rdf:type owl:Restriction ;
+                                 owl:onProperty saref:isControlledByDevice ;
+                                 owl:allValuesFrom saref:Device
+                               ] ,
+                               [ rdf:type owl:Restriction ;
+                                 owl:onProperty saref:isMeasuredByDevice ;
+                                 owl:allValuesFrom saref:Device
+                               ] ,
+                               [ rdf:type owl:Restriction ;
+                                 owl:onProperty saref:relatesToMeasurement ;
+                                 owl:allValuesFrom saref:Measurement
+                               ] ;
+               rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+               rdfs:label "Property"@en .
+
+
+###  https://saref.etsi.org/saref#UnitOfMeasure
+saref:UnitOfMeasure rdf:type owl:Class ;
+                    rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+                    rdfs:label "Unit of measure"@en .
+
+
 #################################################################
 #    Individuals
 #################################################################