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diff --git a/src/google/protobuf/compiler/package_info.h b/src/google/protobuf/compiler/package_info.h
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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.
+// http://code.google.com/p/protobuf/
+//
+// 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.
+
+// Author: kenton@google.com (Kenton Varda)
+//  Based on original Protocol Buffers design by
+//  Sanjay Ghemawat, Jeff Dean, and others.
+//
+// This file exists solely to document the google::protobuf::compiler namespace.
+// It is not compiled into anything, but it may be read by an automated
+// documentation generator.
+
+namespace google {
+
+namespace protobuf {
+
+// Implementation of the Protocol Buffer compiler.
+//
+// This package contains code for parsing .proto files and generating code
+// based on them.  There are two reasons you might be interested in this
+// package:
+// - You want to parse .proto files at runtime.  In this case, you should
+//   look at importer.h.  Since this functionality is widely useful, it is
+//   included in the libprotobuf base library; you do not have to link against
+//   libprotoc.
+// - You want to write a custom protocol compiler which generates different
+//   kinds of code, e.g. code in a different language which is not supported
+//   by the official compiler.  For this purpose, command_line_interface.h
+//   provides you with a complete compiler front-end, so all you need to do
+//   is write a custom implementation of CodeGenerator and a trivial main()
+//   function.  You can even make your compiler support the official languages
+//   in addition to your own.  Since this functionality is only useful to those
+//   writing custom compilers, it is in a separate library called "libprotoc"
+//   which you will have to link against.
+namespace compiler {}
+
+}  // namespace protobuf
+}  // namespace google