| 摘要 |
A system for trading secondhand products online based on a topic map, a method for adding a product list, a method for searching products, and a method for extending keywords are provided. The method for adding a product list comprises the steps of: allowing a web collecting unit to search a webpage including secondhand product transaction information to collect the secondhand product transaction information therefrom; allowing a natural language processing unit to process the collected product transaction information to extract a keyword therefrom; allowing a keyword check unit to designate, if the extracted keyword corresponds to at least one among keywords included in a topic map, the extracted keyword as a valid keyword; and allowing a storage unit to store the collected product transaction information in the occurrence information of a product corresponding to the designated valid keyword, among products included in the topic map. Thus, even if a post for trading of secondhand products is uploaded to any position on a site within a search range, a consumer can search secondhand products, and errors of keywords input by various registrants and consumers can be corrected, thereby satisfying various users. [Reference numerals] (410) Web collecting unit; (415) Natural language processing unit; (420) History storage unit; (425) Input unit; (430) Search word processing unit; (435) Keyword check unit; (450) Storage unit; (451) Keyword DB; (452) Topic map; (AA) Secondhand product transaction site; (BB) Topic map inference engine; (CC) Topic search engine; (DD) Topic map converter; (EE) Automatic topic map builder |
