java - How to find Derivationally Related Forms of a wordnet synset through MIT JWI? -

when retrieving semantic relations of synset through mit java wordnet interface (jwi) can't derivationally related forms. i'm using isynset class method getrelatedsynsets(ipointer p), list returns empty.

as simple test developed class iterates noun synsets of wordnet , tries find synset exposing derivationally related form. surprisingly code can't find single synset relation. here code:

public class derivationallytest {      private static idictionary dict = null;      public static void main(string[] args) throws ioexception {         idictionary dict = dicitionaryfactory();         iterator<isynset> = dict.getsynsetiterator(pos.noun);         while(it.hasnext()){             isynset synset = it.next();             if(synset.getrelatedsynsets(pointer.derivationally_related).size() > 0){                 system.out.println("found one!!!");             }         }     }        public static idictionary dicitionaryfactory() throws ioexception{         if(dict == null){             system.out.println("instanciando dicionario...");             // construct url wordnet dictionary directory             string wnhome = system.getenv("wnhome");             string path = wnhome + file.separator + "dict";              url url = new url("file", null, path);             // construct dictionary object , open             dict = new dictionary(url);              dict.open();         }         return dict;     } } 

am doing wrong or actual bizarre behavior? have developed lot of classes using mit jwi , wouldn't have change api after som work.

i'm using wordnet 3.1 , mit jwi 2.2.3 under ubuntu 12 lts

update: tried wordnet 3.0 , same thing happens.

only semantic pointers attach synsets. lexical pointers attach words. try: iword.getrelatedwords(ipointer ptr)

http://projects.csail.mit.edu/jwi/api/edu/mit/jwi/item/isynset.html#getrelatedsynsets(edu.mit.jwi.item.ipointer)