SYSTEM FOR GIVING WORD NOT TO APPEAR IN DOCUMENT AS KEYWORD

摘要

PURPOSE:To execute operation at a high speed and to simplify the operation by extracting a keyword candidate out of a document, after that, using keyword connection, obtaining the suitability of a word in the keyword connection and defining the suitable word, which does not appear in the document, as a keyword based on the suitability. CONSTITUTION:The keyword candidate word is extracted out of the document by using the keyword connection, for which relation among a lot of the words is described. Next, a relation degree is obtained between the word, which is the keyword candidate word and exists in the keyword connection, and all the words included in the keyword connection. The keyword candidate word, for which the relation degree is = the prescribed degree, is generated as the suitable keyword not to appear in the document, namely, as a complementary keyword. Thus, the document, which can not be retrieved only by the keyword in the document, can be retrieved when the document is retrieved. Then, the operation giving the keyword to the document can be easily executed at the high speed.