Mainly discussed in this paper aboutthe mechanism of tree catalog, the mechanism of document database’s cooperation and link,andthe models of main data structtire,are discusssed is detail.
文中主要讨论树形目录组织机制，文档数据库的协作及链接机制和主要数据结构模型。
参考来源 - 基于超媒体技术的工程制图备课系统·2,447,543篇论文数据，部分数据来源于NoteExpress
Secondly, they produce the list which includes the files and directories will be backuped based on the selection tree before copy and the present catalog tree of file system.
在数据实际备份前根据用户定义的备份资源树和文件系统当前目录树生成一个待备份的文件列表。
The catalog tree of the system keeps synchronized with the database at the cost of performance.
由于要与数据库保持同步，系统目录树的生成成为项目瓶颈之一。
During backup and restore of file system, it needs to merge current backup resource tree and previous one, namely operations between catalog tree and resource tree.
文件系统备份和恢复过程中，需根据当前备份资源树和历史备份资源树进行合并等操作，这种操作在物理上表现为对目录树和资源树的处理。
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