| 摘要 |
A hierarchical structure is provided. The hierarchical structure includes object items for objects located in the hierarchical structure, each object item having a name and a link. The hierarchical structure also includes node items each having a name of a hierarchical path name. A node item is provided for each unique path name in the hierarchical structure and the link of an object item links to a single node item having the hierarchical path name of the object.
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