@prefix dct: <http://purl.org/dc/terms/> .
@prefix geo: <http://www.opengis.net/ont/geosparql#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix stac: <https://w3id.org/ogc/stac/core/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

stac:datetime a owl:DatatypeProperty ;
    rdfs:label "datetime" ;
    rdfs:comment "Datetime associated with the Item (typically acquisition time)." ;
    rdfs:domain stac:Item ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:dateTime .

stac:description a owl:DatatypeProperty ;
    rdfs:label "description" ;
    rdfs:domain [ owl:unionOf ( stac:Catalog stac:Collection ) ] ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:string .

stac:end_datetime a owl:DatatypeProperty ;
    rdfs:label "end datetime" ;
    rdfs:domain stac:Item ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:dateTime .

stac:extent a owl:ObjectProperty ;
    rdfs:label "extent" ;
    rdfs:comment "The spatiotemporal extent of a Collection." ;
    rdfs:domain stac:Collection ;
    rdfs:isDefinedBy stac: .

stac:hasAsset a owl:ObjectProperty ;
    rdfs:label "has asset" ;
    rdfs:comment "Links an Item to one of its Assets." ;
    rdfs:domain stac:Item ;
    rdfs:isDefinedBy stac: ;
    rdfs:range stac:Asset .

stac:href a owl:DatatypeProperty ;
    rdfs:label "href" ;
    rdfs:comment "The link reference (URL)." ;
    rdfs:domain stac:Link ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:anyURI .

stac:id a owl:DatatypeProperty ;
    rdfs:label "id" ;
    rdfs:comment "Unique identifier for a STAC entity." ;
    rdfs:domain [ owl:unionOf ( stac:Catalog stac:Collection stac:Item ) ] ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:string .

stac:license a owl:DatatypeProperty ;
    rdfs:label "license" ;
    rdfs:comment "Collection-wide license applying to Items unless overridden by an Item." ;
    rdfs:domain stac:Collection ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:string .

stac:links a owl:ObjectProperty ;
    rdfs:label "links" ;
    rdfs:comment "Associates a STAC entity with its links." ;
    rdfs:domain [ owl:unionOf ( stac:Catalog stac:Collection stac:Item ) ] ;
    rdfs:isDefinedBy stac: ;
    rdfs:range stac:Link .

stac:mediaType a owl:DatatypeProperty ;
    rdfs:label "media type" ;
    rdfs:comment "The media type of an Asset." ;
    rdfs:domain stac:Asset ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:string .

stac:rel a owl:DatatypeProperty ;
    rdfs:label "rel" ;
    rdfs:comment "The relationship type of the link." ;
    rdfs:domain stac:Link ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:string .

stac:start_datetime a owl:DatatypeProperty ;
    rdfs:label "start datetime" ;
    rdfs:domain stac:Item ;
    rdfs:isDefinedBy stac: ;
    rdfs:range xsd:dateTime .

stac:Asset a owl:Class ;
    rdfs:label "STAC Asset" ;
    rdfs:comment "An Asset represents a file associated with a STAC Item, such as an image, data file, or metadata file." ;
    rdfs:isDefinedBy stac: .

stac:Link a owl:Class ;
    rdfs:label "STAC Link" ;
    rdfs:comment "A Link describes a relationship between STAC entities using rel values and hrefs." ;
    rdfs:isDefinedBy stac: .

stac:Catalog a owl:Class ;
    rdfs:label "STAC Catalog" ;
    rdfs:comment "A STAC Catalog is a JSON object that provides links to other STAC entities." ;
    rdfs:isDefinedBy stac: .

stac:Collection a owl:Class ;
    rdfs:label "STAC Collection" ;
    rdfs:comment "A Collection extends Catalog with additional metadata and describes a group of related STAC Items." ;
    rdfs:isDefinedBy stac: ;
    rdfs:subClassOf stac:Catalog .

stac:Item a owl:Class ;
    rdfs:label "STAC Item" ;
    rdfs:comment "A STAC Item is a GeoJSON Feature augmented with STAC metadata fields and links." ;
    rdfs:isDefinedBy stac: ;
    rdfs:subClassOf geo:Feature .

stac: a owl:Ontology ;
    dct:creator "Rob Atkinson, OGC" ;
    dct:description "Ontology for the SpatioTemporal Asset Catalog (STAC) Core 1.0.0 specification" ;
    dct:license <https://creativecommons.org/publicdomain/zero/1.0/> ;
    dct:title "STAC Core Ontology" .