| 摘要 |
A presentity is used to represent and report states of an issue or a transaction. The issue or the transaction is an intangible (an incorporeal, non-physical) entity. The presentity for the issue or the transaction is created, a state of the issue or the transaction received from a handler of the issue or the transaction is registered in the presentity, and the registered state is reported to watchers of the presentity. Preferably, a handler registers with the presentity as a proxy for the issue or the transaction, and messages sent to the presentity are forwarded to the handler who is the registered proxy. If the issue or the transaction comprises a plurality of entities, preferably a separate presentity for each one of the entities, as well as for the issue or the transaction as a whole, is created and used.
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