@prefix : <https://w3id.org/demeter/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ngsi-ld: <https://uri.etsi.org/ngsi-ld/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix schema: <https://schema.org/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@base <https://w3id.org/demeter/> .

<https://w3id.org/demeter/core> a owl:Ontology ;
                            owl:versionIRI <https://raw.githubusercontent.com/rapw3k/DEMETER/master/models/demeterCore.ttl> ;
                            dct:contributor [ schema:affiliation [ foaf:name "OGC"
                                                                 ] ;
                                              foaf:name "Rob Atkinson"
                                            ] ,
                                            [ schema:affiliation [ foaf:name "ICCS"
                                                                 ] ;
                                              foaf:name "Ioanna Roussaki"
                                            ] ;
                            dct:creator [ schema:affiliation [ foaf:name "PSNC"
                                                             ] ;
                                          rdfs:seeAlso <http://orcid.org/0000-0003-4289-4922> ;
                                          foaf:name "Raul Palma"
                                        ] ;
                            dct:description "The DEMETER core ontology includes the meta-model elements reused from NGSI-LD specification that provide a formal basis for representing 'property graphs' using RDF/RDFS/OWL."@en ;
                            dct:rights "This vocabulary is distributed under Creative Commons Attribution 4.0 License - http://creativecommons.org/licenses/by/4.0"@en ;
                            dct:title "DEMETER core meta-model"@en ;
                            rdfs:comment "The DEMETER core ontology is a profile (subset) of the ontology presented in Annex D of the NGSI-LD standard: ETSI GS CIM 006 V1.1.1 (2019-07), covering only the core property-graph entities."@en ;
                            owl:versionInfo "1.0" ;
                            foaf:maker [ foaf:homepage <https://h2020-demeter.eu/> ;
                                         foaf:name "DEMETER project"
                                       ] .

#################################################################
#    Annotation properties
#################################################################


#################################################################
#    Datatypes
#################################################################


#################################################################
#    Object Properties
#################################################################

### https://uri.etsi.org/ngsi-ld/Property
ngsi-ld:Property a owl:ObjectProperty ;
  rdfs:range [
    a owl:Class ;
    owl:unionOf (
     ngsi-ld:Property
     ngsi-ld:Value
   )
  ] .

### https://uri.etsi.org/ngsi-ld/Relationship
ngsi-ld:Relationship a owl:ObjectProperty ;
  rdfs:domain ngsi-ld:Entity ;
  rdfs:range [
    a owl:Class ;
    owl:unionOf (
     ngsi-ld:Entity
     ngsi-ld:Relationship
   )
  ] .

### https://uri.etsi.org/ngsi-ld/hasObject
ngsi-ld:hasObject a owl:ObjectProperty ;
  rdfs:comment "property to define object of Relationship" ;
	rdfs:domain ngsi-ld:Relationship ;
	rdfs:range ngsi-ld:Entity ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> .

###  https://uri.etsi.org/ngsi-ld/GeoProperty
ngsi-ld:GeoProperty
  a owl:ObjectProperty ;
  rdfs:comment "special case of CoordinateBasedLocation object property" ;
  rdfs:subPropertyOf ngsi-ld:CoordinateBasedLocation ; #rdfs:range ngsi-ld:Geometry  
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> .
 
###  https://uri.etsi.org/ngsi-ld/CoordinateBasedLocation  
ngsi-ld:CoordinateBasedLocation
  a owl:ObjectProperty ;
  rdfs:comment "Coordinate based location object property" ;
  rdfs:subPropertyOf ngsi-ld:LocationProperty ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> .

###  https://uri.etsi.org/ngsi-ld/LocationProperty  
ngsi-ld:LocationProperty
  a owl:ObjectProperty ;
  rdfs:comment "location object property" ;
  rdfs:subPropertyOf ngsi-ld:Property ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> . 

#################################################################
#    Data properties
#################################################################

### https://uri.etsi.org/ngsi-ld/hasValue
ngsi-ld:hasValue
  a owl:DatatypeProperty ;
  rdfs:comment "property to define target value of Property" ;
  rdfs:domain ngsi-ld:Property ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> . 

###  https://uri.etsi.org/ngsi-ld/TemporalProperty  
ngsi-ld:TemporalProperty a owl:DatatypeProperty ;
  rdfs:comment "Temporal data type property" ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> .        

#################################################################
#    Classes
#################################################################

### https://uri.etsi.org/ngsi-ld/Entity
ngsi-ld:Entity a owl:Class ;
	rdfs:comment "Informational representative of something that is supposed to exist in the real world, physically or conceptually. Any instance of such an entity shall be uniquely identified by a URI" ;
  owl:disjointWith  ngsi-ld:Property ,
	                  ngsi-ld:Relationship ,
	                  ngsi-ld:Value ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> .     
								
### https://uri.etsi.org/ngsi-ld/Property
ngsi-ld:Property a owl:Class ;
  rdfs:comment "description instance which associates a main characteristic, which is an NGSI-LD Value, to either an NGSI-LD Entity, an NGSI-LD Relationship or another NGSI-LD Property" ;
	owl:disjointWith ngsi-ld:Relationship ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> .
								 
### https://uri.etsi.org/ngsi-ld/Relationship
ngsi-ld:Relationship a owl:Class ;
  rdfs:comment "description of a directed link between a subject which is either an NGSI-LD Entity, an NGSILD Property, or another NGSI-LD Relationship on one hand, and an object, which is an NGSI-LD Entity, on the other hand" ;
	owl:disjointWith ngsi-ld:Value ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> .							 

### https://uri.etsi.org/ngsi-ld/Value
ngsi-ld:Value a owl:Class ;
  rdfs:comment "JSON value (i.e. a string, a number, true or false, an object, an array), or a JSON-LD typed value (i.e. a string as the lexical form of the value together with a type, defined by an XSD base type or more generally an IRI), or a JSON-LD structured value (i.e. a set, a list, a language-tagged string)" ;
  rdfs:isDefinedBy <https://uri.etsi.org/ngsi-ld/> .
			   

###  Did not include ngsi-ld:Geometry class on purpose, but left the explanation why
###  ngsi-ld:Geometry is subclassof ngsi-ld:Value, which is disjoint with ngsi-ld:Entity. 
###  However geo:Geometry has to be an ngsi-ld:Entity, as it is "may exist as a self-contained entity"
###  and is subclass of geo:SpatialObject (an ngsi-ld:Entity), defined as "Anything spatial (being or having a shape, position or an extent)" 
###  geo:SpatialObject is also parent of geo:Feature (disjoint of geo:Geometry)
###  so geo:Geometry cannot be subclass of ngsi-ld:Geometry because it will say that ngsi-ld:Value is subclass of the disjoint ngsi-ld:Entity
###  https://uri.etsi.org/ngsi-ld/v1/ontology#Geometry
#ngsi-ld:Geometry
#  a owl:Class ;
#  rdfs:subClassOf ngsi-ld:Value .

#################################################################
#    Alignments
#################################################################

#################################################################
#    Individuals
#################################################################