The caller can't just put any request message format on any request channel; it has to know exactly the right message format and channel for the specific service it wishes to invoke.

调用方不能将所有的请求消息格式都放置在任何一个请求通道上；它必须准确地知道希望调用的特定服务的正确消息格式和通道。

youdao

The WSDL would probably also specify the reply channel the caller should listen to for the reply and the format to expect for the reply message.

WSDL 还可能指定调用方应该侦听以获得应答的应答通道，以及应答消息必须具有的格式。

youdao

The WSDL associated with a request channel would describe what service that channel provides as well as the format of the request message the consumer must provide.

与请求通道相关的WSDL描述通道提供什么服务，以及使用者必须提供的请求消息的格式。

youdao

Barnett believes his more traditional channel format is more appealing to advertisers (such as Fandango and Match.com) because they know in advance exactly what videos are running next to their ads.

FORBES: Magazine Article

The RealD Format combines left eye and right eye 3D image streams into a single channel for delivery of high-definition progressive or interlaced 3D video using today's Internet or broadcast infrastructure, including existing PCs, HD set-top boxes and DVRs, to any 3D-enabled display type.

ENGADGET: PopBox licenses RealD's side by side frame compatible 3D format