| 摘要 |
A system and method for organising information items in a database. The system and method use a three-dimensional classification space having a co-ordinate origin, which in a preferred embodiment may be displayed as a rotatable sphere (20). Subject topics are associated in the classification space with solid cones (22) having radii (21) of the sphere as their axes and information items are assigned co-ordinates (24) within the appropiate subject cone. The sphere may be further divided into shells of different radii corresponding to different categories of information items within the same subject area. In retreiving information it is possible to display items of information assigned similar co-ordinates within the classification space and to rotate the sphere to show neighbouring items having associated subject content. The invention has particular application to classifying and searching for web sites or other information on the Internet.
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