Addressed issue #20.

ontology/saref4ehaw.ttl

@@ -5,6 +5,7 @@
 @prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
 @prefix foaf: <http://xmlns.com/foaf/0.1/> .
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @prefix vann: <http://purl.org/vocab/vann/> .
 @prefix voaf: <http://purl.org/vocommons/voaf#> .
 @prefix saref: <https://saref.etsi.org/core/> .
@@ -97,6 +98,10 @@ vann:preferredNamespaceUri rdf:type owl:AnnotationProperty .
 #    Object Properties
 #################################################################
 
+###  http://www.w3.org/2004/02/skos/core#broader
+skos:broader rdf:type owl:ObjectProperty .
+
+
 ###  https://saref.etsi.org/core/consistsOf
 saref:consistsOf rdf:type owl:ObjectProperty ;
                  rdfs:domain s4ehaw:Ban ;
@@ -130,14 +135,6 @@ s4ehaw:hasActivity rdf:type owl:ObjectProperty ;
                    rdfs:label "has activity"@en .
 
 
-###  https://saref.etsi.org/saref4ehaw/hasAgeCategory
-s4ehaw:hasAgeCategory rdf:type owl:ObjectProperty ;
-                      rdfs:domain s4ehaw:HealthActor ;
-                      rdfs:range s4ehaw:AgeCategory ;
-                      rdfs:comment "The age group of a health actor, e.g. old or young."@en ;
-                      rdfs:label "has age category"@en .
-
-
 ###  https://saref.etsi.org/saref4ehaw/hasBanApplicationDomain
 s4ehaw:hasBanApplicationDomain rdf:type owl:ObjectProperty ;
                                rdfs:domain s4ehaw:Ban ;
@@ -915,12 +912,6 @@ s4ehaw:Activity rdf:type owl:Class ;
                 rdfs:label "Activity"@en .
 
 
-###  https://saref.etsi.org/saref4ehaw/AgeCategory
-s4ehaw:AgeCategory rdf:type owl:Class ;
-                   rdfs:comment "The age group of a health actor, e.g. old or young."@en ;
-                   rdfs:label "Age category"@en .
-
-
 ###  https://saref.etsi.org/saref4ehaw/AlarmCommand
 s4ehaw:AlarmCommand rdf:type owl:Class ;
                     rdfs:subClassOf saref:Command ;
@@ -1265,6 +1256,11 @@ s4envi:FrequencyUnit rdf:type owl:Class .
 #    Individuals
 #################################################################
 
+###  https://saref.etsi.org/saref4ehaw/AgeCategory
+s4ehaw:AgeCategory rdf:type owl:NamedIndividual ,
+                            saref:State .
+
+
 ###  https://saref.etsi.org/saref4ehaw/AlcoholDrinking
 s4ehaw:AlcoholDrinking rdf:type owl:NamedIndividual ,
                                 s4ehaw:Habit ;
@@ -1359,7 +1355,8 @@ s4ehaw:OcularImpairment rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4ehaw/Old
 s4ehaw:Old rdf:type owl:NamedIndividual ,
-                    s4ehaw:AgeCategory ;
+                    saref:State ;
+           skos:broader s4ehaw:AgeCategory ;
            rdfs:comment "Old, one user age category."@en ;
            rdfs:label "Old"@en .
 
@@ -1457,7 +1454,8 @@ s4ehaw:WristLocation rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4ehaw/Young
 s4ehaw:Young rdf:type owl:NamedIndividual ,
-                      s4ehaw:AgeCategory ;
+                      saref:State ;
+             skos:broader s4ehaw:AgeCategory ;
              rdfs:comment "Young, one user age category."@en ;
              rdfs:label "Young"@en .