diff -r a2d8ec38e8db -r e8377ac921b6 src/work/alpar/list_graph.h
--- a/src/work/alpar/list_graph.h	Mon Apr 26 08:07:53 2004 +0000
+++ b/src/work/alpar/list_graph.h	Mon Apr 26 09:00:12 2004 +0000
@@ -3,6 +3,7 @@
 #ifndef HUGO_LIST_GRAPH_H
 #define HUGO_LIST_GRAPH_H
 
+///ingroup graphs
 ///\file
 ///\brief ListGraph, SymListGraph, NodeSet and EdgeSet classes.
 
@@ -13,6 +14,9 @@
 
 namespace hugo {
 
+/// \addtogroup graphs
+/// @{
+
   class SymListGraph;
 
   ///A list graph class.
@@ -1566,7 +1570,9 @@
     };
 
   };
-  
+
+/// @}  
+
 } //namespace hugo
 
 #endif //HUGO_LIST_GRAPH_H