| 摘要 |
An electronic record storage system has a plurality of stored records. Each record includes its content (such as a word processor document, spreadsheet, or drawing) which may be changed from time to time. In addition, each record has a record identifier (such as its filename or URL) which is not normally changed when the record content is changed. The content of each record can be printed out as and when required. In order to facilitate synchronization of the stored records and the printed records, advantage is taken of a version identifier (such as a timestamp) which is changed when the content of that record is changed. A marking (50) from which the respective record identifier (32) and version identifier (38) can be derived is included in the print (48) of the content (34) of a such record. Subsequently, a user can scan the marking on the print (preferably with a hand-held scanner) to produce marking image data. A scan-derived record identifier and scan-derived version identifier are then derived from the marking image data. The scan-derived record identifier is used to access the respective current record and obtain the respective currently-stored version identifier. The scan-derived version identifier is then compared with the currently-stored version identifier, and the result of the comparison is given to the user. In the case where the version identifier is a timestamp, the timestamp which can be derived from the marking on the print need not be the timestamp of the record, but instead may be a timestamp indicative of the time of printing.
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