public String catName(int catidx)
  {
    if(!_ok || catidx<0 || catidx>=h_catindex_size()){
      return null;
    }
    int catoffset = _catindex.getInt(4*catidx);
    return getString(catoffset);
  }
Class for accessing the concept network automata.

@author  <a href="mailto:boros@yahoo-inc.com">Peter Boros</a>
fsa/src/main/java/com/yahoo/fsa/conceptnet/ConceptNet.java