提出在现有主动推送的信息交换模式基础上，增加采用发布订阅机制实现的信息按需共享方法。
And with the basic of active sendind, we increased publish-subscribe mechanism, finally we summarized data share model with active sendind and publish-subscribe technology.
对话：对话是一种特殊的交互模式形式，其中涉及的各方都知道之前交换的消息(即各方均保留状态信息)。
Conversations: a conversation is a special form of interaction pattern where the parties involved have awareness of previously exchanged messages (that is, the parties hold state information).
有关消息交换模式的更多信息，请参见W3C网站。
For more information about Message Exchange Patterns please refer to the W3C web site.
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