diff -r 741f3108a90f -r e997802b855c src/work/alpar/list_graph_demo.cc
--- a/src/work/alpar/list_graph_demo.cc	Sat Nov 13 12:24:01 2004 +0000
+++ b/src/work/alpar/list_graph_demo.cc	Sat Nov 13 12:53:28 2004 +0000
@@ -111,10 +111,10 @@
     Graph::SymEdgeMap<int> sm(G);
     for(EdgeIt e(G);G.valid(e);G.next(e)) em[e]=G.id(e);
     for(EdgeIt e(G);G.valid(e);G.next(e))
-      if(G.tail(e)<G.head(e)) sm[e]=G.id(e);
+      if(G.source(e)<G.target(e)) sm[e]=G.id(e);
     
     for(EdgeIt e(G);G.valid(e);G.next(e))
-      std::cout << G.id(G.tail(e)) << "->" << G.id(G.head(e))
+      std::cout << G.id(G.source(e)) << "->" << G.id(G.target(e))
 		<< ": id=" << G.id(e) << " oppid=" << G.id(G.opposite(e))
 		<< " em=" << em[e]
 		<< " sm=" << sm[e] << "\n";