Text retrieval method and system using signature of nearby words
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United States of America Patent
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Jul 30, 1996
Issued Date -
N/A
app pub date -
Jul 27, 1994
filing date -
Dec 10, 1992
priority date (Note) -
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Abstract
A method for searching a document corpus for query terms includes generating a list of document terms including a term signature for each term based upon characteristics of a number of adjacent terms. The term signatures can be generated by generating a bit vector for each term within a predetermined adjacent number of terms from each document term, such as through application of a hash function. The bit vectors can then be combined to form the term signature. The word signature alternatively can be generated using one or more morphological properties of the terms. The predetermined adjacent number of terms can be the number of search terms minus one, and may precede, follow, or both precede and follow the document term for which the term signature is generated. A search signature is generated for the query terms excluding a reference term, based upon the predetermined characteristics. The term signature of the reference term is compared with the search signature, and an indication is provided when the term signature of the reference term and the search signature match.
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