@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl:  <http://www.w3.org/2002/07/owl#> .
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .
@prefix ex:   <http://example.org/> .

# --- Classes ---------------------------------------------------------------

ex:Researcher  a owl:Class ;
    rdfs:label "Researcher" .

ex:Publication  a owl:Class ;
    rdfs:label "Publication" .

ex:Institution  a owl:Class ;
    rdfs:label "Institution" .

# --- Datatype properties (vertex fields) -----------------------------------

ex:fullName     a owl:DatatypeProperty ;
    rdfs:domain ex:Researcher ;
    rdfs:range  xsd:string .

ex:orcid        a owl:DatatypeProperty ;
    rdfs:domain ex:Researcher ;
    rdfs:range  xsd:string .

ex:title        a owl:DatatypeProperty ;
    rdfs:domain ex:Publication ;
    rdfs:range  xsd:string .

ex:year         a owl:DatatypeProperty ;
    rdfs:domain ex:Publication ;
    rdfs:range  xsd:integer .

ex:doi          a owl:DatatypeProperty ;
    rdfs:domain ex:Publication ;
    rdfs:range  xsd:string .

ex:instName     a owl:DatatypeProperty ;
    rdfs:domain ex:Institution ;
    rdfs:range  xsd:string .

ex:country      a owl:DatatypeProperty ;
    rdfs:domain ex:Institution ;
    rdfs:range  xsd:string .

# --- Object properties (edges) --------------------------------------------

ex:authorOf  a owl:ObjectProperty ;
    rdfs:domain ex:Researcher ;
    rdfs:range  ex:Publication .

ex:affiliatedWith  a owl:ObjectProperty ;
    rdfs:domain ex:Researcher ;
    rdfs:range  ex:Institution .

ex:cites  a owl:ObjectProperty ;
    rdfs:domain ex:Publication ;
    rdfs:range  ex:Publication .