Matching the plural table of contents data of layered structure to every table of contents

摘要

PPROBLEM TO BE SOLVED: To provide a table-of-contents data retrieval controller for retrieving proper description information according to a plurality of input keywords even in a database such as a technical book having the table-of-contents of a hierarchical structure. PSOLUTION: In retrieving information about tomato dish good for health, a keyword 1 "tomato"/2 "health" relating to desired information are input, and an "enter" key 16b is operated on a keyword input screen G1, and table-of-contents data with description information in which at least one keyword of a plurality of keywords is included in description information, and the other keywords are included in table-of-contents data higher than the description information are retrieved from hierarchical table-of-contents in each book data and the description information, and the retrieved table-of-contents data are associated with icons expressing the book names, and displayed in a list as a retrieval table-of-contents list screen G3a. Then, the description information which is present lower than the table-of-contents data designated and displayed by a reversal cursor K is displayed as a designated table-of-contents content preview screen G3b. PCOPYRIGHT: (C)2007,JPO&INPIT