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diff --git a/libxsd-frontend/transformations/schema-per-type.hxx b/libxsd-frontend/transformations/schema-per-type.hxx
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+++ b/libxsd-frontend/transformations/schema-per-type.hxx
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+// file      : libxsd-frontend/transformations/schema-per-type.hxx
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef LIBXSD_FRONTEND_TRANSFORMATIONS_SCHEMA_PER_TYPE_HXX
+#define LIBXSD_FRONTEND_TRANSFORMATIONS_SCHEMA_PER_TYPE_HXX
+
+#include <vector>
+
+#include <libxsd-frontend/types.hxx>
+
+#include <libxsd-frontend/semantic-graph/elements.hxx> // Path
+#include <libxsd-frontend/semantic-graph/schema.hxx>
+
+namespace XSDFrontend
+{
+  namespace Transformations
+  {
+    class SchemaPerTypeTranslator
+    {
+    public:
+      virtual
+      ~SchemaPerTypeTranslator ();
+
+      // The following two functions should return empty string if
+      // there is no match.
+      //
+      virtual String
+      translate_type (String const& ns, String const& name) = 0;
+
+      virtual NarrowString
+      translate_schema (NarrowString const& abs_path) = 0;
+    };
+
+    // This transformation restructures the semantic graph to have
+    // each type definition in a seperate schema file.
+    //
+    class SchemaPerType
+    {
+    public:
+      struct Failed {};
+
+      // If a type of an element or attribute has a context entry
+      // with the by_value_key key and it is true, then the schema
+      // for this type is included "strongly".
+      //
+      SchemaPerType (SchemaPerTypeTranslator&,
+                     bool fat_type_file,
+                     char const* by_value_key = 0);
+
+      std::vector<SemanticGraph::Schema*>
+      transform (SemanticGraph::Schema&);
+
+    private:
+      bool fat_type_file_;
+      char const* by_value_key_;
+      SchemaPerTypeTranslator& trans_;
+    };
+  }
+}
+
+#endif // LIBXSD_FRONTEND_TRANSFORMATIONS_SCHEMA_PER_TYPE_HXX