| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide technique capable of taking-out a target file without specifying a directory structure when the target file is not taken out without designating the directory structure since the structure of the stored directory has to be designated in order to take out the target file from a file system in a conventional manner. <P>SOLUTION: Data retrieval servers 100A, 100B displays the type and value of meta information added to the file to be retrieved as a low-order directory. When a user indicates a movement to the specified low-order directory, the data retrieval servers retrieve the type and value of the meta information with the identifier of the indicated directory as a retrieval key. In this case, the retrieval key is cumulatively stored, so as to narrow the file including the whole retrieval keys cumulatively stored in the meta information, and to present the file. Then, it is prevented that the file can not be taken out since the storage destination of the data is not recognized by not asking the designation order of the retrieval keys. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
