@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 rml: <http://semweb.mmlab.be/ns/rml#> .
@prefix ql: <http://semweb.mmlab.be/ns/ql#> .
@prefix activity: <http://example.com/activity/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@base <http://example.com/base/> .

<TriplesMap2>
  a rr:TriplesMap;
  rml:logicalSource [ 
    rml:source "student.csv";
    rml:referenceFormulation ql:CSV
  ];

  rr:subjectMap [ rr:template "http://example.com/{Sport}" ];

  rr:predicateObjectMap [
    rr:predicate rdf:type ;
    rr:object activity:Sport ;
  ] .

<TriplesMap1>
  a rr:TriplesMap;

  rml:logicalSource [ 
    rml:source "student.csv";
    rml:referenceFormulation ql:CSV
  ];

  rr:subjectMap [ rr:template "http://example.com/Student/{ID}/{Name}" ];
	
  rr:predicateObjectMap [ 
    rr:predicate rdf:type ;
    rr:object foaf:Person ;
  ];
		
  rr:predicateObjectMap [ 
    rr:predicate ex:id ;
    rr:objectMap [ rml:reference "ID"; ]
  ];

  rr:predicateObjectMap [ 
    rr:predicate foaf:name ;
    rr:objectMap [ rml:reference "Name" ]
  ];
 
  rr:predicateObjectMap [ 
    rr:predicate ex:Sport ;
    rr:objectMap <RefObjectMap1>
  ] .

 
<RefObjectMap1>
  a rr:RefObjectMap;
  rr:parentTriplesMap <TriplesMap2> .