@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix : <https://w3id.org/itsdata/location/v1/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix its-core: <https://w3id.org/itsdata/core/v1/> .
@prefix schema: <https://schema.org/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix vann: <http://purl.org/vocab/vann/> .
@prefix geo: <http://www.opengis.net/ont/geosparql#> .
@prefix cdm1: <https://w3id.org/citydata/part1/v1/> .

:LocationCorePattern
    a owl:Ontology ;
    dcterms:title "ITS Location Referencing Core"@en ;
    skos:definition "Core abstractions for spatial concepts, including features, geometries, and feature collections used across multiple location-referencing methodologies."@en ;
    dcterms:creator "Kenneth Vaughn" ;
    dcterms:created "Draft" ;
    dcterms:modified "2026-04-29"^^xsd:date ;
    dcterms:license "http://creativecommons.org/licenses/by/4.0/" ;
    its-core:draft "true" ;
    owl:versionInfo "0.0.1" ;
    owl:versionIRI <https://w3id.org/itsdata/location/v1/LocationCorePattern/r0.1> ;
    vann:preferredNamespacePrefix "its-location" ;
    vann:preferredNamespaceUri "https://w3id.org/itsdata/location/v1/" ;
    owl:imports its-core: .

#################################################################
# Core classes
#################################################################

:LocationThing
    a owl:Class ;
    skos:definition "Parent class for location domain concepts."@en .

:SpatialObject
    a owl:Class ;
    rdfs:subClassOf :LocationThing ;
    rdfs:subClassOf geo:SpatialObject ;
    skos:definition "A spatial object within the ITS domain (subclass of geo:SpatialObject)."@en .

:Feature
    a owl:Class ;
    rdfs:subClassOf :SpatialObject ;
    rdfs:subClassOf geo:Feature ;
    skos:definition "An abstraction of real-world phenomena. An ITS-domain feature (subclass of geo:Feature) used to model real-world things that have a spatial location."@en ;
    skos:note "Geographic features can be defined for any geographic entity that can be defined with geospatial boundaries, such as landmarks, buildings, transport infrastructure (e.g., road, pathway, railway, bridge structures, intersections, traffic signal cabinet, traffic signal pole, waterway), jurisdictional areas (e.g., country, city), etc."@en .

:Geometry
    a owl:Class ;
    rdfs:subClassOf :SpatialObject ;
    rdfs:subClassOf geo:Geometry ;
    skos:definition "A description of a spatial location in the real world according to a defined reference system."@en ;
    skos:note "A Geometry can be complex, such as a jurisdictional area that consists of multiple islands."@en ;
    skos:note "Within ITS, Geometries are typically on or near the surface of the Earth."@en .

:CodedGeometry
    a owl:Class ;
    rdfs:subClassOf :Geometry ;
    skos:definition "A geometry whose extent is resolved via an external code, registry, or service (a pointer to a geometry held elsewhere)."@en .

:CoordinateGeometry
    a owl:Class ;
    rdfs:subClassOf :Geometry ;
    skos:definition "A geometry that is represented by a coordinate system (i.e., directly encodes coordinate tuples)."@en .

:CoordinateReferenceSystem
    a owl:Class ;
    rdfs:subClassOf :LocationThing ;
    skos:definition "A coordinate reference system (CRS) used to interpret coordinate tuples in a CoordinateGeometry. Typically identified using an OGC CRS IRI such as http://www.opengis.net/def/crs/EPSG/0/4326."@en .

:LocationGroup
    a owl:Class ;
    rdfs:subClassOf :Feature ;
    skos:definition "An unordered set of multiple physically separate features (each typically a singular feature with its own geometry)."@en .

:LocationCode
    a owl:Class ;
    rdfs:subClassOf :LocationThing ;
    rdfs:subClassOf its-core:Code ;
    skos:definition "A code that identifies (or can be used to look up) a location in some external referencing system."@en .

:FacilityCode
    a owl:Class ;
    rdfs:subClassOf its-core:Code ;
    skos:definition "A code that identifies a type of facility."@en ;
    skos:example "surface street, motorway, bus stop, etc."@en .

#################################################################
# Core properties
#################################################################

:LocationObjectProperty
    a owl:ObjectProperty ;
    skos:definition "Organizational super-property for location core object properties."@en .

:LocationDataProperty
    a owl:DatatypeProperty ;
    skos:definition "Organizational super-property for location core data properties."@en .

:hasMember
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :LocationGroup ;
    schema:rangeIncludes :Feature ;
    skos:definition "Relates a location group to a member feature."@en .

:hasLookupCode
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :CodedGeometry ;
    schema:rangeIncludes :LocationCode ;
    skos:definition "Associates a coded geometry with the location code used to retrieve or resolve its geometric extent in an external system."@en .

:geometryOf
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    owl:inverseOf geo:hasGeometry ;
    schema:domainIncludes :Geometry ;
    schema:rangeIncludes :Feature ;
    skos:definition "Inverse of geo:hasGeometry: relates a geometry to the feature it represents."@en .

:hasCRS
    a owl:ObjectProperty ;
    rdfs:subPropertyOf :LocationObjectProperty ;
    schema:domainIncludes :CoordinateGeometry ;
    schema:rangeIncludes :CoordinateReferenceSystem ;
    skos:definition "Associates a CoordinateGeometry with the coordinate reference system used to interpret its coordinate tuples."@en .

:coordinateEpoch
    a owl:DatatypeProperty ;
    rdfs:subPropertyOf :LocationDataProperty ;
    schema:domainIncludes :CoordinateGeometry ;
    schema:rangeIncludes xsd:dateTime ;
    skos:definition "The epoch (observation/realization time) at which the coordinate tuples of a CoordinateGeometry are valid in its CRS. Needed for dynamic reference frames."@en .