| 摘要 |
Several different methods for presenting (e.g., displaying) a hierarchical structure are presented. The hierarchical structure includes multiple elements, and defines hierarchical relationships between the elements. The hierarchical structure may be embodied within an electronic document such as a Web document, an interactive application program, or a map divided into sections. Each element has a "presentation property" which may be a value or a function. A single one of the elements has "focus" (e.g., in accordance with the coding of the document by an author, by default, etc.). A "view depth" method includes forming a model (e.g., a tree structure) of the hierarchical structure. The model includes multiple levels ranked with respect to one another, multiple nodes representing elements, and at least one branch.
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