초록 ▼

A system and a method for searching does not rely on prior compiled vocabulary information or grammatical information to perform a search. The search may accommodate new words or phrases, and perform a document search using a request of a user for document search. A unique character string is extrac

A system and a method for searching does not rely on prior compiled vocabulary information or grammatical information to perform a search. The search may accommodate new words or phrases, and perform a document search using a request of a user for document search. A unique character string is extracted from an input document and a similarity search is performed by using the unique character string. The extraction of the unique character string is performed by calculating and evaluating an amount of feature of a character string through comparison between appearance frequency appearing in the input document and appearance frequency in a set of documents to be searched. Then, the extracted unique character string is used as the basis for the search. Documents found by the search are evaluated and arranged in the order of evaluation. The similarity factor of document is evaluated by using the appearance frequency of each unique character string in the input document so that higher evaluation is provided to a document in which unique character strings with higher weight appears many times.

대표청구항 ▼

[ What is claimed is:] [1.] A method for identifying at least one unique character string in an input document which is input into a computer system, said computer system being operable to search one or more documents which are searchably stored in a storage medium, and said unique character string

[ What is claimed is:] [1.] A method for identifying at least one unique character string in an input document which is input into a computer system, said computer system being operable to search one or more documents which are searchably stored in a storage medium, and said unique character string is used as a search string, the method comprising:associating and managing position information for a position in said searchably stored documents where one or more partial comparison document character strings are extracted from said searchably stored documents;extracting a partial input character string from said input document, and determining whether said partial input character string is a candidate character string;identifying a partial comparison document character string which matches at least a part of said candidate character string with a predetermined similarity factor or higher;identifying position data associated with said partial comparison document character string which matches with said predetermined similarity factor or higher; andrecognizing said candidate character string as the unique character string by comparing appearance frequency information of at least a part of said candidate character string appearing in said input document with the position data and evaluating an amount of feature of said candidate character string.