| 摘要 |
A searching process employs an organization of data, in terms of categories, descriptors and identities of various items, which is stored in a data bank. To search for one of the items, there is a selecting of a plurality of categories drawn from the stored categories in any of a plurality of orders to produce a sequence of categories, of which at least one category relates to descriptors of the object. In the sequence of categories, there are at least two sequential categories of which a latter category restricts a range of object descriptors of a former category by a Boolean intersection. Available categories for use in the search are displayed in a list, and a category which represents a null set of object descriptors is withdrawn from the list. Negation and OR functions are provided. |
