| 摘要 |
PROBLEM TO BE SOLVED: To accurately extract data corresponding to a retrieval condition from compressed data while keeping the compressed data.SOLUTION: When compressing document data, a compression processing part 10a compresses the document data, by converting character strings included in the document data and break characters included in the document data into codes, separately. Since the compressed document data are compressed separately for the character strings and the segmentation characters, a retrieval processing part 10c can obtain proper retrieval result even if the compressed data is extracted as it is, on the basis of a retrieval expression. |
