SUMMARY GENERATING DEVICE, ELECTRONIC BOOK DEVICE, ELECTRONIC BOOK SYSTEM, SERVER OF ELECTRONIC BOOK SYSTEM, SUMMARY GENERATING METHOD, DOCUMENT DATA DISPLAY METHOD, PROGRAM, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To generate or display a variety of summaries while reducing necessary storage capacity. SOLUTION: When a 'read of a previous summary' is selected, the bookmark place of the last date and time is read out (step S41) and then the bookmark place right before the latest one is read out (step S42). The data format B between the two points (the latest bookmark place and the bookmark place right before it) are arranged to generate the summary between the two points (step S44). Namely, parts which are used as a summary in the novel body are stored in the data format B. For the purpose, character strings stored in the data format B in the novel body are arranged to generate the summary.