// import edu.neu.ccs.demeter.dj.*;
import java.util.*;
import java.lang.reflect.*;

Main = .
//DH-full
//--------------------
//  Copyright (C) 1991 Northeastern University.

//  Permission is granted to any individual or institution to use, copy, modify,
//  and distribute this class dictionary, provided that this complete copyright 
//  and permission notice is maintained, intact, in all copies and supporting
//  documentation.

Cd_graph = < adjacencies > Nlist(Adjacency) EOF.                                                                        
Adjacency =                                                               
  < source > Vertex                                                        
  < ns > Neighbors                                                         
  "." *l .                                                                   
Neighbors :                                                                
  Neighbors_wc .                                                                
Neighbors_wc :                                                             
  Construct_ns |                                                           
  Alternat_ns                                                              
  common < construct_ns > List(Any_vertex).                              
Construct_ns = *s "=" *s.
Alternat_ns = *s ":" *s                                                      
  < alternat_ns > Bar_list(Term) [<common> Common].                        
Common = "common".                                                       
Any_vertex :                                                               
  Opt_labeled_term                                                         
  | Optional_term                                                          
  | Syntax_vertex                                                          
  .
Vertex =  < vertex_name > Ident *s.                                    
Syntax_vertex :                                                            
  Regular_syntax                                                           
  common.                                                                
Regular_syntax  = < string > String .                                      
Opt_labeled_term :                                                         
  Labeled                                                                  
  | Regular                                                                
    common <vertex> Term.                                                
Regular = .                                                                
Labeled = *s "<" < label_name > Ident ">" *s.     
Term :                                                                     
  Normal                                                                   
  common <vertex> Vertex                                               
  .
Normal = .                                                                 
Optional_term = "[" <opt> Sandwich(Opt_labeled_term) "]".                  
// parameterized classes                                                    
List(S) ~ {S}.                                                             
Nlist(S) ~ S {S}.                                                          
Bar_list(S) ~ S {"|"*s S}.                                                   
Comma_list(S) ~ S {"," S}.                                                 
Sandwich(S) =                                                              
  <first> List(Syntax_vertex) <inner> S                                    
  <second> List(Syntax_vertex)                                             
  .              
MyVisitor : XMLVisitor common extends Visitor.                                                          
XMLVisitor = .