重要：因为内容模型的修改基于用户交互，并且仅适用于给定的用户，所以这些修改将存储在用户的会话中。
Important: Because modifications of the content model are based on user interactions and only apply to a given user, those modifications are stored in the user's session.
提出一种基于会话管理器的站点查询算法和分布式备份模型，保证系统可靠协作。
A query algorithm and distributed backup model based on session manager are proposed to guarantee the reliability of cooperative editing systems.
本文重点研究了基于P 2 P网络架构和SIP标准产生的新的网络系统架构——P 2 P SIP网络会话模型。
The article mainly makes a research on the new network system — P2PSIP Internet Phonebased on P2P network architecture and SIP standard.
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