diff -r 3351c85ffa02 -r 0274acee0e35 lemon/concept/graph.h
--- a/lemon/concept/graph.h	Tue Jun 07 16:11:23 2005 +0000
+++ b/lemon/concept/graph.h	Tue Jun 07 16:12:14 2005 +0000
@@ -22,6 +22,7 @@
 ///\brief Declaration of Graph.
 
 #include <lemon/invalid.h>
+#include <lemon/utility.h>
 #include <lemon/concept/maps.h>
 #include <lemon/concept_check.h>
 #include <lemon/concept/graph_component.h>
@@ -43,6 +44,12 @@
       :  virtual public BaseGraphComponent,
          public IterableGraphComponent, public MappableGraphComponent {
     public:
+      ///\e
+
+      ///\todo undocumented
+      ///
+      typedef False UndirTag;
+      
       typedef BaseGraphComponent::Node Node;
       typedef BaseGraphComponent::Edge Edge;
 
@@ -115,6 +122,12 @@
     class StaticGraph
     {
     public:
+      ///\e
+
+      ///\todo undocumented
+      ///
+      typedef False UndirTag;
+
       /// Defalult constructor.
 
       /// Defalult constructor.