Stf refinement

examples/exampleIrrigationUseCase1.ttl

 @prefix dcterms: <http://purl.org/dc/terms/> .
 @prefix dctype: <http://purl.org/dc/dcmitype/> .
-@prefix ex: <https://saref.etsi.org/saref4agri/v1.1.2/example/exampleIrrigationUseCase1/> .
+@prefix ex: <https://saref.etsi.org/saref4agri/v2.1.1/example/exampleIrrigationUseCase1/> .
 @prefix geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> .
 @prefix geosp: <http://www.opengis.net/ont/geosparql#> .
 @prefix om: <http://www.ontology-of-units-of-measure.org/resource/om-2/> .
@@ -14,17 +14,19 @@
 @prefix time: <http://www.w3.org/2006/time#> .
 @prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
 
-<https://saref.etsi.org/saref4agri/v1.1.2/example/exampleIrrigationUseCase1#> a dctype:Dataset ;
+<https://saref.etsi.org/saref4agri/v2.1.1/example/exampleIrrigationUseCase1#> a dctype:Dataset ;
   dcterms:license <https://forge.etsi.org/etsi-software-license> ;
   dcterms:conformsTo <https://saref.etsi.org/core/v3.1.1/> ;
-  dcterms:conformsTo <https://saref.etsi.org/saref4agri/v1.1.2/> ;
+  dcterms:conformsTo <https://saref.etsi.org/saref4agri/v2.1.1/> ;
   dcterms:title "SAREF4AGRI example for the Smar Irrigation use case."@en ;
-  dcterms:description "SAREF4AGRI example for the Smar Irrigation use case."@en .
+  dcterms:description "SAREF4AGRI example for the Smar Irrigation use case."@en ;
+  owl:imports saref:, s4agri: ;
+.
 
 time:hasEnd a owl:ObjectProperty .
 time:hasBeginning a owl:ObjectProperty .
 time:inXSDDateTimeStamp a owl:DatatypeProperty .
-
+dctype:Dataset a owl:Class .
 
 om:millibar
   rdf:type owl:NamedIndividual ;
@@ -93,3 +95,5 @@ ex:instant_2017-12-31T235959
   rdf:type time:Instant ;
   time:inXSDDateTimeStamp "2017-12-31T23:59:59"^^xsd:dateTime ;
 .
+time:Instant a owl:Class; rdfs:isDefinedBy time: .
+dcterms:conformsTo a owl:AnnotationProperty; rdfs:isDefinedBy dcterms: .
\ No newline at end of file