punctuation added to NDTrans

lib/src/experimental/NDTrans.gf

@@ -8,9 +8,18 @@ abstract NDTrans =
   ,Chunk
               ** {
 flags
-  startcat=Phr;
+  startcat = TransUnit ;
 --  heuristic_search_factor=0.60;
 --  meta_prob=1.0e-5;
 --  meta_token_prob=1.1965149246222233e-9;
 
+cat
+  TransUnit ;
+
+fun
+  SFullstop  : Phr -> TransUnit ;
+  SQuestmark : Phr -> TransUnit ;
+  SExclmark  : Phr -> TransUnit ;
+  SUnmarked  : Phr -> TransUnit ;
+
 }