App1 makes a request to the registration service to register to use coordination protocol X.

App1向注册服务提出请求来注册使用协调协议x。

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A particular coordination protocol provides a definition of the behavior requirements and the operations supported for completion processing.

一个特定的协调协议将提供对支持完成处理所需的行为要求和操作的定义。

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The coordination type is specified when the coordination context is created, but the coordination protocol is not specified until registration.

当协调上下文创建以后，协调类型被指定，但是协调协议直到注册时才被指定。

youdao

Some of the members in IMUnified, however, claim the new protocol could arrive sooner rather than later, citing contractual coordination between the companies as the biggest obstacle to timely delivery.

CNN: AOL rivals team on IM interoperability