code: private void initialize() {
  
  		domainIds.addAll(getResourceIds("rdfs:domain"));
  		rangeIds.addAll(getResourceIds("rdfs:range"));
  		typeIds.addAll(getResourceIds("krdf:type"));
  
  		allowsInstances     = "true".equals(getValue(getFirstElement(getElement(), "krdf:allowsInstances")));
  		multipleOccurrences = "true".equals(getValue(getFirstElement(getElement(), "krdf:multipleOccurrences")));
  		isMixedIn           = "true".equals(getValue(getFirstElement(getElement(), "krdf:isMixedIn")));
  		oneWay              = "true".equals(getValue(getFirstElement(getElement(), "krdf:oneWay")));
  	}
docs: ----- protected methods -----