This enables primitives (custom or pre-built) to access the message in a uniform way, regardless of the protocol that was used to send it.

这样，原语(自定义或预置)就能够以统一的方式访问消息，而不受用于发送消息的协议的影响。

youdao

POX is an XML messaging protocol, where you simply send XML message, without the SOAP envelope wrapped around it.

POX是一种XML消息协议，在这里，你只要发送XML消息，而不需要用SOAP包将它封装起来。

youdao

A client should not have to know where a resource is located, what protocol it responds to, and what API should be used to send a message to it.

客户机应该不必分辨出资源的定位，与什么协议彼此相应，以及什么API应该用于向其发送消息。

youdao

Once the victim received a text message that included a certain protocol, the malware would send the collected data back to the command-and-control server.

FORBES: First-Known Targeted Malware Attack On Android Phones Steals Contacts And Text Messages