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diff --git a/libxsd-frontend/xsd-frontend/traversal/compositors.hxx b/libxsd-frontend/xsd-frontend/traversal/compositors.hxx
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+// file      : xsd-frontend/traversal/compositors.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2006-2010 Code Synthesis Tools CC
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef XSD_FRONTEND_TRAVERSAL_COMPOSITORS_HXX
+#define XSD_FRONTEND_TRAVERSAL_COMPOSITORS_HXX
+
+#include <xsd-frontend/traversal/elements.hxx>
+#include <xsd-frontend/semantic-graph/compositors.hxx>
+
+namespace XSDFrontend
+{
+  namespace Traversal
+  {
+    //
+    //
+    struct ContainsParticle: Edge<SemanticGraph::ContainsParticle>
+    {
+      ContainsParticle ()
+      {
+      }
+
+      ContainsParticle (NodeBase& n)
+      {
+        node_traverser (n);
+      }
+
+      virtual Void
+      traverse (Type&);
+    };
+
+
+    //
+    //
+    struct ContainsCompositor: Edge<SemanticGraph::ContainsCompositor>
+    {
+      ContainsCompositor ()
+      {
+      }
+
+      ContainsCompositor (NodeBase& n)
+      {
+        node_traverser (n);
+      }
+
+      virtual Void
+      traverse (Type&);
+    };
+
+    //
+    //
+    struct Compositor : Node<SemanticGraph::Compositor>
+    {
+      virtual Void
+      traverse (Type&);
+
+      virtual Void
+      pre (Type&);
+
+      virtual Void
+      contains (Type&);
+
+      virtual Void
+      contains (Type&, EdgeDispatcherBase&);
+
+      virtual Void
+      post (Type&);
+    };
+
+
+    //
+    //
+    struct All : Node<SemanticGraph::All>
+    {
+      virtual Void
+      traverse (Type&);
+
+      virtual Void
+      pre (Type&);
+
+      virtual Void
+      contains (Type&);
+
+      virtual Void
+      contains (Type&, EdgeDispatcherBase&);
+
+      virtual Void
+      post (Type&);
+    };
+
+
+    //
+    //
+    struct Choice : Node<SemanticGraph::Choice>
+    {
+      virtual Void
+      traverse (Type&);
+
+      virtual Void
+      pre (Type&);
+
+      virtual Void
+      contains (Type&);
+
+      virtual Void
+      contains (Type&, EdgeDispatcherBase&);
+
+      virtual Void
+      post (Type&);
+    };
+
+
+    //
+    //
+    struct Sequence : Node<SemanticGraph::Sequence>
+    {
+      virtual Void
+      traverse (Type&);
+
+      virtual Void
+      pre (Type&);
+
+      virtual Void
+      contains (Type&);
+
+      virtual Void
+      contains (Type&, EdgeDispatcherBase&);
+
+      virtual Void
+      post (Type&);
+    };
+  }
+}
+
+#endif  // XSD_FRONTEND_TRAVERSAL_COMPOSITORS_HXX