#
# An OpenLink ontology for the Diffbot Natural Language API
#
@prefix opldb: <http://www.openlinksw.com/schemas/diffbot#> .

@prefix oa: <http://www.w3.org/ns/oa#> .
@prefix cc: <http://creativecommons.org/ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix ovt: <http://open.vocab.org/terms/> .
@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 schema: <http://schema.org/> .
@prefix wdrs: <http://www.w3.org/2007/05/powder-s#> .
@prefix xhv: <http://www.w3.org/1999/xhtml/vocab#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<http://www.openlinksw.com/schemas/diffbot#>
  a owl:Ontology ;
  rdfs:label "OpenLink Ontology for Diffbot" ;
  schema:description"""An ontology that defines entity and relation types used to generate RDF based Linked Data from 
  the Diffbot Natural Language API."""@en ;
  rdfs:commnet """The OpenLink Diffbot ontology provides types and relations to fill gaps not covered by other ontologies, e.g. schema.org,
  when mapping the Diffbot Natural Language API output to RDF. This ontology alone does not aim provide complete coverage of the Natural Language API."""@en ;
  schema:creator <http://www.openlinksw.com/#this> ;
  schema:dateCreated "2020-10-09T09:00:00-00:00"^^xsd:dateTime ;
  schema:dateModified "2020-10-09T09:00:00-00:00"^^xsd:dateTime ;
  schema:creator <http://www.openlinksw.com/#this> ;
  wdrs:describedby <http://www.openlinksw.com/schemas/diffbot> ;
  owl:versionInfo "1.0.0"^^xsd:string ;

  ovt:defines 
    opldb:EntityType ,
    opldb:Fact ,
    opldb:OpenFact ,
    opldb:entityType ,
    opldb:fact ,
    opldb:openFact ,
    opldb:salience ,
    opldb:sentiment ,
    opldb:factSubject ,
    opldb:factPredicate ,
    opldb:factObject ;

  schema:about
    opldb:EntityType ,
    opldb:Fact ,
    opldb:OpenFact ,
    opldb:entityType ,
    opldb:fact ,
    opldb:openFact ,
    opldb:salience ,
    opldb:sentiment ,
    opldb:factSubject ,
    opldb:factPredicate ,
    opldb:factObject .

<http://www.openlinksw.com/data/turtle/cartridge_ontologies/diffbot.ttl>
  a foaf:Document , schema:TechArticle ;
  rdfs:label "OpenLink Ontology for Diffbot Natural Language API (Turtle)"^^xsd:string ;
  cc:license <http://creativecommons.org/licenses/by-sa/3.0/> ;
  schema:creator <http://www.openlinksw.com/#this> ;
  rdfs:commnet """This is a turtle document that uses Linked Data oriented content to describe an OpenLink ontology for the Diffbot Natural Language API"""@en ;
  foaf:primaryTopic <http://www.openlinksw.com/schemas/diffbot#> ;
  xhv:canonical <http://www.openlinksw.com/schemas/diffbot> ;
  xhv:describes <http://www.openlinksw.com/schemas/diffbot#> ;
  schema:about <http://www.openlinksw.com/schemas/diffbot#> ;
  dcterms:subject <http://www.openlinksw.com/schemas/diffbot#> ;
  foaf:topic
    opldb:EntityType ,
    opldb:Fact ,
    opldb:OpenFact ,
    opldb:entityType ,
    opldb:fact ,
    opldb:openFact ,
    opldb:salience ,
    opldb:sentiment ,
    opldb:factSubject ,
    opldb:factPredicate ,
    opldb:factObject .

opldb:EntityType
  a owl:Class ;
  rdfs:label "EntityType" ;
  rdfs:comment """The type of an extracted entity. Example: organization, person."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> .

opldb:Fact
  a owl:Class ;
  rdfs:label "Fact" ;
  rdfs:comment """A fact whose properties have been pre-defined in the Diffbot schema.
    A fact defines a relationship between entities (Apple Inc; founder; Steve Jobs) or an entity and a literal (Apple Inc; number of employees; 137,000)
  """@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> .

opldb:OpenFact
  a owl:Class ;
  rdfs:label "OpenFact" ;
  rdfs:comment """An open-domain fact whose description has been extracted from the text alone. 
    Rather than following a particular schema, these facts enable new properties to be discovered."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> .

opldb:entityType
  a rdf:Property, owl:ObjectProperty ;
  rdfs:label "entityType" ;
  rdfs:comment """Points to an EntityType identified by text analysis."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> ;
  rdfs:range opldb:EntityType ;
  rdfs:domain oa:Annotation .

opldb:fact
  a rdf:Property, owl:ObjectProperty ;
  rdfs:label "fact" ;
  rdfs:comment """Points to a Fact identified by text analysis."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> ;
  rdfs:range opldb:Fact ;
  rdfs:domain oa:Annotation .

opldb:openFact
  a rdf:Property, owl:ObjectProperty ;
  rdfs:label "openFact" ;
  rdfs:comment """Points to an OpenFact identified by text analysis."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> ;
  rdfs:range opldb:OpenFact ;
  rdfs:domain oa:Annotation .

opldb:salience
  a rdf:Property, owl:DatatypeProperty ;
  rdfs:label "salience" ;
  rdfs:comment """This value helps answer the question: 'What is this text mainly about?'. 
    Salience of 1.0 means the entity is the main topic of the document, while salience of 0.0 means that the entity is unnecessary to understand the document."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> ;
  rdfs:range xsd:decimal ;
  rdfs:domain oa:Annotation .

opldb:sentiment
  a rdf:Property, owl:DatatypeProperty ;
  rdfs:label "sentiment" ;
  rdfs:comment """A value representing the overall sentiment of the text relating to an entity or the document text itself. 
    It ranges from -1.0 (very negative) to 1.0 (very positive). Sentiment around 0.0 is considered neutral."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> ;
  rdfs:range xsd:decimal ;
  rdfs:domain oa:Annotation .

opldb:factSubject
  a rdf:Property, owl:DatatypeProperty ;
  rdfs:label "factSubject" ;
  rdfs:comment """States the subject of a Diffbot Fact or OpenFact."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> ;
  rdfs:range rdfs:Literal ;
  rdfs:domain opldb:Fact, opldb:OpenFact .

opldb:factPredicate
  a rdf:Property, owl:DatatypeProperty ;
  rdfs:label "factPredicate" ;
  rdfs:comment """States the predicate of a Diffbot Fact or OpenFact."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> ;
  rdfs:range rdfs:Literal ;
  rdfs:domain opldb:Fact, opldb:OpenFact .

opldb:factObject
  a rdf:Property, owl:DatatypeProperty ;
  rdfs:label "factObject" ;
  rdfs:comment """States the object of a Diffbot Fact or OpenFact."""@en ;
  rdfs:isDefinedBy <http://www.openlinksw.com/ontology/diffbot#> ;
  rdfs:range rdfs:Literal ;
  rdfs:domain opldb:Fact, opldb:OpenFact .