| 摘要 |
PROBLEM TO BE SOLVED: To generate a map wherein usability of a user is improved. SOLUTION: Contour lines 101A, 101B or the like show distribution density of literature information included in the map 100. The map 100 is also displayed with a plurality of keywords 102. The keyword 102 is a main keyword characterizing each piece of the literature information of a literature information group configuring the map 100. The map 100 is also displayed with a target symbol 110 showing coordinates of target information described with an outline of invention contents, research contents or the like. One or more guide words 111 are respectively displayed around the target symbol 110 correspondingly to respective up-and-down and right-and-left coordinate axes of the map 100. The guide word 111 shows a revealed or potential keyword distributively present around the target information. The user can sets it as material for investigating directionality of patent application, or research and development. COPYRIGHT: (C)2007,JPO&INPIT
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