@prefix rr: <http://www.w3.org/ns/r2rml#> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix ex: <http://example.com/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@base <http://example.com/base/> .

<TriplesMap1>
    a rr:TriplesMap;
        
	rr:logicalTable [ rr:tableName  "\"Student\"" ];
	
    rr:subjectMap 
    [ 
        rr:template	"http://example.com/resource/student_{\"ID\"}";
        rr:class	<http://example.com/ontology/Student>;
        rr:graph	<http://example.com/graph/students> ;
    ]; 
	
    rr:predicateObjectMap
    [ 
      rr:predicate	foaf:name ; 
      rr:objectMap	[ rr:column "\"Name\""; ];
      rr:graph		<http://example.com/graph/students> ;
    ];

    rr:predicateObjectMap
    [ 
      rr:predicate	<http://example.com/ontology/practises> ; 
      rr:objectMap	[ 
           a rr:RefObjectMap ;
           rr:parentTriplesMap <TriplesMap2>;
           rr:joinCondition [
				rr:child "\"Sport\"" ;
				rr:parent "\"ID\"" ;
		   ]
      ];
      rr:graph	<http://example.com/graph/practise> ;
    ];
    .

<TriplesMap2>
    a rr:TriplesMap;

	rr:logicalTable [ rr:tableName  "\"Sport\"" ];

    rr:subjectMap 
    [ 
        rr:template "http://example.com/resource/sport_{\"ID\"}";
        rr:class <http://example.com/ontology/Sport>;
        rr:graph <http://example.com/graph/sports> ;
    ]; 
	
    rr:predicateObjectMap
    [ 
		rr:predicate	rdfs:label ; 
		rr:objectMap	[ rr:column "\"Name\""; ];
    ];
	.