public void putIdentifier(String idName,Element element){
  if (element == null) {
    removeIdentifier(idName);
    return;
  }
  if (needsSyncData()) {
    synchronizeData();
  }
  if (identifiers == null) {
    identifiers=new Hashtable();
  }
  identifiers.put(idName,element);
}

public void putIdentifier ( String idName , Element element ) { if ( element == null ) { removeIdentifier ( idName ) ; return ; } if ( needsSyncData ( ) ) { synchronizeData ( ) ; } if ( identifiers == null ) { identifiers = new Hashtable ( ) ; } identifiers . put ( idName , element ) ; }
registers an identifier name with a specified element node . if the identifier is already registered , the new element node replaces the previous node . if the specified element node is null , removeidentifier ( ) is called .
