Information retrieval systems

Details Information retrieval systems Information retrieval systems

1975-04-14

1976-06-15

Zache, Raulfe B.

Communications: electrical

Digital comparator systems

G06F 100

Patent

active

039640299

ABSTRACT:
An information retrieval system in which each record in a file is scanned and a hit signal is produced if it matches a search criterion. The hits are stored in a plurality of bit maps. Each record has an identifying index, which is transformed in a number of different ways to produce addresses for the bit maps. The outputs of the bit maps are combined to produce a stored hit signal. The number of hits is compared with the number of stored hits to determine whether any spurious stored hits have been recorded and, if so, the transformations are modified.

REFERENCES:
patent: 3358270 (1967-12-01), Crew et al.
patent: 3484751 (1969-12-01), Cameron et al.

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