diff --git a/ontology/saref4ehaw.ttl b/ontology/saref4ehaw.ttl
index 9da0cd77ff50689600148906c597c357fd69d3cd..cfb27829740ca682f7cc13749ceef2c951da073b 100644
--- a/ontology/saref4ehaw.ttl
+++ b/ontology/saref4ehaw.ttl
@@ -315,7 +315,15 @@ s4ehaw:inCurrentMode rdf:type owl:ObjectProperty ;
                      rdfs:domain s4ehaw:HealthDevice ;
                      rdfs:range s4ehaw:Mode ;
                      rdfs:comment "Each eHealth device has modes of operations that model its dynamic characteristic varying during its lifetime, e.g. active, parked, sleeping..."@en ;
-                     rdfs:label "in current mode"@en .
+                     rdfs:label "in current mode"@en  .
+
+
+###  https://saref.etsi.org/saref4ehaw/interfaceProtocol
+s4ehaw:interfaceProtocol rdf:type owl:ObjectProperty ;
+                         rdfs:domain s4ehaw:Interface ;
+                         rdfs:range s4ehaw:CommunicationProtocol ;
+                         rdfs:comment "The interface communication protocol can be e.g. BLE, serial, Ethernet..."@en ;
+                         rdfs:label "interface protocol"@en .
 
 
 ###  https://saref.etsi.org/saref4ehaw/isAttachedTo
@@ -334,6 +342,14 @@ s4ehaw:isDescribedBy rdf:type owl:ObjectProperty ;
                      rdfs:label "is described by"@en .
 
 
+###  https://saref.etsi.org/saref4ehaw/groundingProtocol
+s4ehaw:groundingProtocol rdf:type owl:ObjectProperty ;
+                         rdfs:domain s4ehaw:ServiceGrounding ;
+                         rdfs:range s4ehaw:CommunicationProtocol ;
+                         rdfs:comment "The grounding protocol is the protocol used to transmit the message by the service, e.g. BLE."@en ;
+                         rdfs:label "grounding protocol"@en .
+
+
 ###  https://saref.etsi.org/saref4ehaw/precision
 s4ehaw:precision rdf:type owl:ObjectProperty ;
                  rdfs:domain s4ehaw:MeasurementFunction ;
@@ -522,14 +538,6 @@ s4ehaw:geolocation rdf:type owl:DatatypeProperty ;
                    rdfs:label "geolocation"@en .
 
 
-###  https://saref.etsi.org/saref4ehaw/groundingProtocol
-s4ehaw:groundingProtocol rdf:type owl:DatatypeProperty ;
-                         rdfs:domain s4ehaw:ServiceGrounding ;
-                         rdfs:range xsd:string ;
-                         rdfs:comment "The grounding protocol is the protocol used to transmit the message of the service, e.g. BLE."@en ;
-                         rdfs:label "grounding protocol"@en .
-
-
 ###  https://saref.etsi.org/saref4ehaw/hasCalculationMethod
 s4ehaw:hasCalculationMethod rdf:type owl:DatatypeProperty ;
                             rdfs:domain s4ehaw:ServiceProcess ;
@@ -642,14 +650,6 @@ s4ehaw:interfaceDescription rdf:type owl:DatatypeProperty ;
                             rdfs:label "interface description"@en .
 
 
-###  https://saref.etsi.org/saref4ehaw/interfaceProtocol
-s4ehaw:interfaceProtocol rdf:type owl:DatatypeProperty ;
-                         rdfs:domain s4ehaw:Interface ;
-                         rdfs:range xsd:string ;
-                         rdfs:comment "The interface communication protocol can be e.g. BLE, serial, Ethernet..."@en ;
-                         rdfs:label "interface protocol"@en .
-
-
 ###  https://saref.etsi.org/saref4ehaw/isDerivedData
 s4ehaw:isDerivedData rdf:type owl:DatatypeProperty ;
                      rdfs:domain s4ehaw:Data ;
@@ -924,6 +924,13 @@ s4ehaw:ChronicDisease rdf:type owl:Class  ;
                       rdfs:label "Chronic disease"@en .
 
 
+
+###  https://saref.etsi.org/saref4ehaw/CommunicationProtocol
+s4ehaw:CommunicationProtocol rdf:type owl:Class  ;
+                             rdfs:comment "The communication protocol, e.g. BLE, serial, Ethernet..."@en ;
+                             rdfs:label "Communication protocol"@en .
+
+
 ###  https://saref.etsi.org/saref4ehaw/BanCommunicationType
 s4ehaw:BanCommunicationType rdf:type owl:Class ;
                             rdfs:comment "The BAN communication function type, i.e. periodic, event driven or on request."@en ;