| 摘要 |
PROBLEM TO BE SOLVED: To reduce costs, time and effort to acquire necessary information. SOLUTION: In this invention, information of items offered from the outside is called as supply information. Supply information, which is acquired based on collecting site registration of supply information by Step 158 via a communication network, is format-converted according to format conversion rules at Steps 160 and 162. Subsequently, at Step 164, item code conversion is performed based on item code registration to generate unified supply information. At step 166, the unified supply information on past and the above-described unified supply information are compared, and then differential information on the unified supply information is generated. As a result, unified format and name for supplies are acquired not depending on providing sites of supply information. In addition, it becomes easy to obtain new or changed supply information. |
