Events trigger a notification only if they are specified in the register call.
仅当在注册调用中指定了事件时,事件才会触发一个通知。
It is usually best to pass a filter during registration, even if the current implementation only emits a certain type of notification.
通常,最好是在注册过程中来传递过滤器,即使当前实现只发出某种特定类型的通知。
As defined in WSDL grammar, the notification operation has only the output element.
如wsdl语法中所定义的,通知操作仅具有输出元素。
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