초록 ▼

A document retrieval system for searching a document coinciding with a retrieval request the user inputs and further ranking the document in accordance with the degree of coincidence between the document and the retrieval request. In the document retrieval system, a word frequency calculating sectio

A document retrieval system for searching a document coinciding with a retrieval request the user inputs and further ranking the document in accordance with the degree of coincidence between the document and the retrieval request. In the document retrieval system, a word frequency calculating section finds out the number of documents where a word appears, a frequency of occurrence of the word in a document and obtains a weighting parameter for the word, and a frequency score calculating section obtains a frequency score on the basis of the output of the word frequency calculating section. In addition, a word cooccurrence relation checking section checks word cooccurrence relations of the retrieval request and the document, and a cooccurrence score calculating section calculates a cooccurrence score from the degree of coincidence therebetween. A document score calculating section calculates a document score on the basis of the frequency score and the cooccurrence score. The documents are ranked in order of document score and displayed to the user.

대표청구항 ▼

[ What is claimed is:] [1.] A document retrieval system which searches a target document to be retrieved in response to a retrieval request and ranks a retrieval result, said system retaining index information for each of a plurality of fields of said target document and comprising: a field rate inp

[ What is claimed is:] [1.] A document retrieval system which searches a target document to be retrieved in response to a retrieval request and ranks a retrieval result, said system retaining index information for each of a plurality of fields of said target document and comprising: a field rate inputting means for allowing the user to specify a rate of influence of a field on a ranking of said retrieval result, and for allowing the user to specify said rate of influence of any field on the ranking of said retrieval result.