| 摘要 |
Documents are grouped into a plurality of subjects. For documents associated with each subject, a document hierarchy is established that includes a plurality of hierarchical levels. A three-dimensional landscape defined by x, y and z orthogonal axes is displayed on a screen, and a plurality of document stacks are arranged in the landscape. Each document stack in the landscape corresponds to a subject, and has a plurality of layers arranged perpendicular to the length of the stack. Each layer in each document stack corresponds to one of the hierarchical levels of the hierarchy established for the subject corresponding to the stack. Images representing documents assigned to each level of the hierarchy are displayed in the layer of the stack corresponding to such level. A user navigates among the document images displayed in the landscape using a cursor.
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