@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 rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@base <http://example.com/base/> .
@prefix d2rq: <http://www.wiwiss.fu-berlin.de/suhl/bizer/D2RQ/0.1#> .

<TriplesMap1>
  a rr:TriplesMap;

  rml:logicalSource [
    rml:source <#DB_source>;
    rr:sqlVersion rr:SQL2008;
    rr:tableName "student";
  ];

  rr:subjectMap [ rr:template "http://example.com/resource/student_{ID}" ];
	
  rr:predicateObjectMap [ 
    rr:predicate foaf:name ;
    rr:objectMap [ rml:reference "Name" ]
  ] ;

  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" ;
      ]
    ]
  ] .

<TriplesMap2>
  a rr:TriplesMap;
		
    rml:logicalSource [
      rml:source <#DB_source>;
      rr:sqlVersion rr:SQL2008;
      rr:tableName "sport";
    ];

  rr:subjectMap [ rr:template "http://example.com/resource/sport_{ID}" ]; 
	
  rr:predicateObjectMap [ 
    rr:predicate rdfs:label ; 
    rr:objectMap [ rml:reference "Name" ];
  ].


<#DB_source> a d2rq:Database;
  d2rq:jdbcDSN "CONNECTIONDSN"; # the "jbdc:mysql:// part is ignored
  d2rq:jdbcDriver "com.mysql.cj.jdbc.Driver"; # this is ignored
  d2rq:username "root";
  d2rq:password "" .