| 摘要 |
In order to make more efficient virtual folder creation work which is required at the time of virtually classifying files, the present invention provides a system having: a function of extracting keywords and frequencies thereof included in metadata; and a function of creating a virtual folder on the basis of the extracted keywords and the extracted frequencies thereof. At the time of extracting the keywords, character strings which can be considered as the keywords are comprehensively extracted. In addition, at the time of creating the virtual folder, the virtual folder is provided with a hierarchical structure including at least two hierarchical levels of a parent folder and a child folder. At the time of creating the child folder, in the case where child folder candidates having equivalent frequencies exist, a candidate having a longer character string is adopted. |
