G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 17/30 (2006.01)
Patent
CA 2093341
A system (10) and method for information retrieval includes an input device (12), a storage device (14), an output device (18), and a data file (20) stored in the storage device (14) including n data records, and one or more index files (22) having data corresponding to a key value comprising information derived from a data record, and the record number of the data record con- taining the data from which the key value is derived. The retrieval system (10) further includes memory for storing a temporary solution bitmask n bits in length where each bit corresponds to a record in the data file (20) and logic (16) for accessing the data file (20) ascertaining the record number for each data record corresponding to a key value which satisfies the search criteria, and logic (16) for setting the bit corresponding to that record number in the temporary solution bitmask. The system (10) also prefer- ably includes logic (16) for analyzing individual search criteria in a search query containing a plurality of search criteria to deter- mine the extent to which the search is optimizable using the present invention, and logic (16) for combining each of the temporary solution bitmasks ascertained for particular search criteria in a query to obtain a final solution bitmask representative of the set of all data records satisfying the query.
Christensen Eric R.
Fulton David L.
Tallman Brian M.
Microsoft Corporation
Oyen Wiggs Green & Mutala Llp
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