| 摘要 |
PROBLEM TO BE SOLVED: To provide a similarity judging method, a document retrieving device and a document classifying device capable of precisely judging similarity between document element having plural subjects or sub-titles, judging the similarity using the feature of the document elements and precisely judging the similarity by solving the incompleteness of morphemic analysis, and to provide a storage medium in which a document retrieval program is stored and a storage medium in which a document classification program is stored. SOLUTION: The word used in document element composed of word string, the Boolean operator join of the word string, sentence, document, or document set is extracted from the document element (S1), the criticality is imparted to the extracted word (S2), and the relevancy degree is imparted to the extracted two arbitrary words (S3). Then, the subjects of respective document elements are expressed by graphics prepared with the criticality of the word as the weight of a node and with the relevancy degree between those words as the weight of the link (S4), and the similarity between the document elements is judged based on the matching degree between graphics expressing the subjects (S5).
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