code: @Override
  	public boolean includeRelation(SRelation relation) {
  		Map<String, Set<String>> displayedRelAnnotations = new HashMap<String, Set<String>>();
  
  		// if no configuration set output the relation
  		if (relation instanceof SPointingRelation) {
  			if (configurations.get(1) == null) {
  				return true;
  			} else {
  				displayedRelAnnotations = displayedPointingRelAnnotations;
  			}
  		}
  
  		if (relation instanceof SSpanningRelation) {
  			if (configurations.get(2) == null) {
  				return true;
  			} else {
  				displayedRelAnnotations = displayedSpanningRelAnnotations;
  			}
  		}
  
  		if (relation instanceof SDominanceRelation) {
  			if (configurations.get(3) == null) {
  				return true;
  			} else {
  				displayedRelAnnotations = displayedDominanceRelAnnotations;
  			}
  		}
  
  		Set<SAnnotation> relAnnotations = relation.getAnnotations();
  
  		return includeObject(relAnnotations, displayedRelAnnotations);
  	}
docs: Implements the includeRelation method of the
  org.corpus_tools.salt.util.ExportFilter interface.