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diff --git a/kaldi_io/src/tools/openfst/include/fst/extensions/far/main.h b/kaldi_io/src/tools/openfst/include/fst/extensions/far/main.h
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+// main.h
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Copyright 2005-2010 Google, Inc.
+// Author: riley@google.com (Michael Riley)
+//
+// \file
+// Classes and functions for registering and invoking Far main
+// functions that support multiple and extensible arc types.
+
+#ifndef FST_EXTENSIONS_FAR_MAIN_H__
+#define FST_EXTENSIONS_FAR_MAIN_H__
+
+#include <fst/extensions/far/far.h>
+
+namespace fst {
+
+FarEntryType StringToFarEntryType(const string &s);
+FarTokenType StringToFarTokenType(const string &s);
+
+// Return the 'FarType' value corresponding to a far type name.
+FarType FarTypeFromString(const string &str);
+
+// Return the textual name  corresponding to a 'FarType;.
+string FarTypeToString(FarType type);
+
+string LoadArcTypeFromFar(const string& far_fname);
+string LoadArcTypeFromFst(const string& far_fname);
+
+}  // namespace fst
+
+#endif  // FST_EXTENSIONS_FAR_MAIN_H__