Patent ID: 6175828
Filing Date: 2001-01-16
Classification: G06F,Y10S

Abstract:
A retrieval apparatus comprising:input means for inputting a request-text for retrieval;a word dictionary containing words together with corresponding word vectors;a database for storing data, each including at least a word, together with corresponding data vectors;word extracting means for extracting a word in the request-text by using the word dictionary;vector generating means for generating a request-text vector from the request-text by using the word dictionary and the word extracting means;vector retrieving means for determining a semantic similarity of each of the data vectors to the request-text vector;key-word retrieving means for searching the data including a word being common to that included in the request-text by using the word extracting means; andextended retrieving means for retrieving data adapted to the request-text on the basis of the semantic similarity of data vector to the request-text vector and the correspondence of the word in the data being searched by the keyword retrieving means to the extracted word in the request-text.