Apache Etch 是跨平台，语言和传输方法独立的框架，用来构建和消耗网络服务。Etch 工具集包括一个网络服务描述语言，一个编译器，各种语言绑定库。Etch 同时也是传输方式独立，允许根据需求使用不同的传输方式。Etch 的目标是简单的去定义小的，集中的服务，容易被访问，结合和部署。

Etch 是要提供一个简洁，正式的描述客户端和服务端信息交换，这强大的功能要支持：

• support one-way and two-way, real-time communication

• high performance and scalability

• support clients and servers written in different languages

• support clients/servers running in a wide range of contexts (such as thin web client, embedded device, PC application, or server)

• support anyone adding new language bindings and new transports

• be fast and small, while still being flexible enough to satisfy requirements

• finally, it must be easy to use for developers both implementing and/or consuming the service.

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