DOCUMENT SET FEATURING METHOD, DOCUMENT SET RETRIEVAL METHOD USING THE SAME AND DEVICE THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a document set featuring method, a document set retrieval method using the method and the device by which the similarity of document sets can surely be judged and similar document sets can be retrieved by turning vector data for which the features of documents for constituting the document set are elements to the feature amount of the document set.;SOLUTION: A tree t is constituted of the entire documents d11, d12, d13, d21, d22, d23, d31, d32 and d33 for constituting the document sets s1, s2 and s3 and the tree t constituted in such a manner is divided into some segments g1 and g2. Distributions for indicating how many documents are included in the divided respective segments g1 and g2 for the respective document sets s1, s2 and s3 are decided as the feature amounts s1 (1, 2), s2 (2, 1) and s3 (1, 2) of the respective document sets s1, s2 and s3.;COPYRIGHT: (C)2001,JPO