this.monitor = monitor ;
NodeTupleTable ntt = dsg.getTripleTable().getNodeTupleTable() ;
this.nodeTable = ntt.getNodeTable() ;
this.writerTriples = new WriteRows(outputTriples, 3, 20000) ;
this.writerQuads = new WriteRows(outputQuads, 4, 20000) ;
this.stats = new StatsCollectorNodeId() ;
}