| 摘要 |
<p>In order to improv e convenience when a user manually searches for desired data, a control unit (4) saves, for each of multiple document files stored in multiple folders constituting a tree structure, a data string comprising folder names of folders included in an absolute path leading to the folders in which the document files are stored, the control unit (4) saving on a hard disk (8) the data string as meta information for the document files. Also, the control unit (4) causes an image indicating a virtual tree composed of multiple virtual folders corresponding to the multiple folders to be displayed on a display unit (12) on the basis of the data string stored on the hard disk (8). When at least one folder name is specified by the user, the control unit (4) updates a data string including the folder name specified by the user among the data strings stored in the hard disk (8).</p> |
