If the Server cannot execute the service, or if access is denied, it shall issue a SecurityAccess responseprimitive with the Negative response parameters.
如果服务器不能实施该项指令，或者拒绝进入，它可以用否定回应参数发出安全进入指令作为回应。
2
When the service sends its response, a new instance of the mediation flow continues processing from the service invoke primitive that performed the service invocation.
当服务发送其响应时，新的中介流实例继续从执行服务调用的服务调用原语进行处理。
3
Use of the response flow within aggregation: Even with the enhanced intra-flow service invocation support provided by the service Invoke primitive, response flows play a key role within a mediation.