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diff --git a/libxsd-frontend/xsd-frontend/traversal/schema.hxx b/libxsd-frontend/xsd-frontend/traversal/schema.hxx
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+// file      : xsd-frontend/traversal/schema.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2005-2010 Code Synthesis Tools CC
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef XSD_FRONTEND_TRAVERSAL_SCHEMA_HXX
+#define XSD_FRONTEND_TRAVERSAL_SCHEMA_HXX
+
+#include <xsd-frontend/traversal/elements.hxx>
+#include <xsd-frontend/semantic-graph/schema.hxx>
+
+namespace XSDFrontend
+{
+  namespace Traversal
+  {
+    //
+    //
+    struct Uses: Edge<SemanticGraph::Uses>
+    {
+      Uses ()
+      {
+      }
+
+      Uses (NodeBase& n)
+      {
+        node_traverser (n);
+      }
+
+      virtual Void
+      traverse (Type& e)
+      {
+        dispatch (e.schema ());
+      }
+    };
+
+    //
+    //
+    struct Implies: Edge<SemanticGraph::Implies>
+    {
+      Implies ()
+      {
+      }
+
+      Implies (NodeBase& n)
+      {
+        node_traverser (n);
+      }
+
+      virtual Void
+      traverse (Type& e)
+      {
+        dispatch (e.schema ());
+      }
+    };
+
+
+    //
+    //
+    struct Sources: Edge<SemanticGraph::Sources>
+    {
+      Sources ()
+      {
+      }
+
+      Sources (NodeBase& n)
+      {
+        node_traverser (n);
+      }
+
+      virtual Void
+      traverse (Type& e)
+      {
+        dispatch (e.schema ());
+      }
+    };
+
+
+    //
+    //
+    struct Includes: Edge<SemanticGraph::Includes>
+    {
+      Includes ()
+      {
+      }
+
+      Includes (NodeBase& n)
+      {
+        node_traverser (n);
+      }
+
+      virtual Void
+      traverse (Type& e)
+      {
+        dispatch (e.schema ());
+      }
+    };
+
+
+    //
+    //
+    struct Imports: Edge<SemanticGraph::Imports>
+    {
+      Imports ()
+      {
+      }
+
+      Imports (NodeBase& n)
+      {
+        node_traverser (n);
+      }
+
+      virtual Void
+      traverse (Type& e)
+      {
+        dispatch (e.schema ());
+      }
+    };
+
+
+    //
+    //
+    struct Schema: ScopeTemplate<SemanticGraph::Schema>
+    {
+      virtual Void
+      traverse (Type& s)
+      {
+        pre (s);
+
+        iterate_and_dispatch (
+          s.uses_begin (), s.uses_end (), edge_traverser ());
+
+        names (s);
+
+        post (s);
+      }
+
+      virtual Void
+      pre (Type&)
+      {
+      }
+
+      virtual Void
+      post (Type&)
+      {
+      }
+    };
+  }
+}
+
+#endif  // XSD_FRONTEND_TRAVERSAL_SCHEMA_HXX