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+[[introduction]]
+== Introduction
+
+Cowboy is a small, fast and modular HTTP server written in Erlang.
+
+Cowboy aims to provide a complete HTTP stack, including its derivatives
+Websocket and REST. Cowboy currently supports HTTP/1.0, HTTP/1.1, HTTP/2,
+Websocket (all implemented drafts + standard) and Webmachine-based REST.
+
+Cowboy is a high quality project. It has a small code base, is very
+efficient (both in latency and memory use) and can easily be embedded
+in another application.
+
+Cowboy is clean Erlang code. It includes hundreds of tests and its code
+is fully compliant with the Dialyzer. It is also well documented and
+features both a Function Reference and a User Guide.
+
+=== Prerequisites
+
+Beginner Erlang knowledge is recommended for reading this guide.
+
+Knowledge of the HTTP protocol is recommended but not required, as it
+will be detailed throughout the guide.
+
+=== Supported platforms
+
+Cowboy is tested and supported on Linux.
+
+Cowboy has been reported to work on other platforms, but we make no
+guarantee that the experience will be safe and smooth. You are advised
+to perform the necessary testing and security audits prior to deploying
+on other platforms.
+
+Cowboy is developed for Erlang/OTP 17.0, 17.1.2 and 17.3. By the time
+this branch gets released the target version will probably be 18.0 and
+above.
+
+Cowboy may be compiled on other Erlang versions with small source code
+modifications but there is no guarantee that it will work as expected.
+
+Cowboy uses the maps data type which was introduced in Erlang 17.0.
+
+=== Versioning
+
+Cowboy uses http://semver.org/[Semantic Versioning 2.0.0].
+
+=== Conventions
+
+In the HTTP protocol, the method name is case sensitive. All standard
+method names are uppercase.
+
+Header names are case insensitive. Cowboy converts all the request
+header names to lowercase, and expects your application to provide
+lowercase header names in the response.
+
+The same applies to any other case insensitive value.