question: public FilterableTripleHandler ( StringBuffer osw , List < String > negativeFilterNamespaces , List < String > positivFilterNamespaces ) { this . writer = osw ; this . negativeFilterNamespaces = negativeFilterNamespaces ; this . positiveFilterNamespaces = positivFilterNamespaces ; for ( String ex : EXTRACTORS ) { triplesPerExtractor . put ( ex , new Long ( 0 ) ) ; } }
target:  Create a FilterableTripleHandler which allows the controlled exclusion of triples belonging to namespaces which are not wanted