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R2RML Schema in Turtle

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This is a Turtle translation of the XML Schema in [1]. 

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rr: <http://www.w3.org/ns/r2rml#> .

# ------------------
# the RDF term Map classes (for objects that describe mapping to RDF terms)
# ------------------

rr:IRIMap a rdfs:Class .
rr:bNodeMap a rdfs:Class .
rr:LiteralMap a rdfs:Class .

# ------------------
# the superclasses for RDF term types
# ------------------

rr:RDFTermMap a rdfs:Class .
rr:RDFSubjectTermMap rdfs:subClassOf rr:RDFTermMap .

rr:LiteralMap rdfs:subClassOf rr:RDFTermMap .
rr:IRIMap  rdfs:subClassOf rr:RDFSubjectTermMap .
rr:bNodeMap  rdfs:subClassOf rr:RDFSubjectTermMap .

# ------------------
# the ClassMap class
# ------------------

rr:ClassMap a rdfs:Class .

rr:class rdfs:domain rr:ClassMap; rdfs:range rdf:Resource .
rr:graph rdfs:domain rr:ClassMap; rdfs:range rdf:Resource .

rr:sqlDefString rdfs:domain rr:ClassMap; rdfs:range xsd:string .

rr:instanceIdMap rdfs:domain rr:ClassMap; rdfs:range rr:RDFSubjectTermMap .
rr:propertyMap rdfs:domain rr:ClassMap; rdfs:range rr:RDFTermMap .
rr:ComputedPropertyMap rdfs:domain rr:ClassMap; rdfs:range rr:IRIMap .

rr:RDFTypeURIPropertyMap rdfs:domain rr:ClassMap; rdfs:range rr:IRIMap .
rr:GraphURIPropertyMap rdfs:domain rr:ClassMap; rdfs:range rr:IRIMap .

rr:foreignKeyMap rdfs:domain rr:ClassMap; rdfs:range rr:ForeignKeyClass .

# ------------------
# property definitions for the RDFTermMap class
# ------------------

rr:column rdfs:domain rr:RDFTermMap; rdfs:range xsd:String .
rr:property rdfs:domain rr:RDFTermMap; rdfs:range rdf:Resource .
rr:inverseExpr rdfs:domain rr:RDFTermMap; rdfs:range xsd:String .

rr:Datatype rdfs:domain rr:RDFTermMap; rdfs:range rdf:Resource .
rr:Language rdfs:domain rr:RDFTermMap; rdfs:range xsd:String .

rr:GraphURI rdfs:domain rr:RDFTermMap; rdfs:range rdf:Resource .

rr:constantValue rdfs:domain rr:RDFTermMap; rdfs:range xsd:String .

# ------------------
# property definitions for the ForeignKeyClass class
# ------------------

rr:key rdfs:domain rr:ForeignKeyClass ; rdfs:range rdf:Resource .
rr:parentClass rdfs:domain rr:ForeignKeyClass ; rdfs:range rdf:Resource .
rr:joinCondition rdfs:domain rr:ForeignKeyClass ; rdfs:range xsd:String .
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