protected static String referenceFromDocumentInformation(
     IfcDocumentInformation documentInformation) {
   String referenceString = "";
   if (!COBieUtility.isNA(documentInformation.getDescription())) {
     referenceString = documentInformation.getDescription();
   } else {
     referenceString = documentInformation.getName();
   }
   return COBieUtility.getCOBieString(referenceString);
 }
 protected static String descriptionFromDocumentInformation(
     IfcDocumentInformation documentInformation) {
   String documentation = documentInformation.getDescription();
   return COBieUtility.getCOBieString(documentation);
 }