| 摘要 |
PROBLEM TO BE SOLVED: To enable a consumer to quickly and easily retrieve desired commodities, by preparing a pattern learning means, which produces a rule to extract the information having a designated attribute based on this attribute. SOLUTION: A meta-data designation part 1 refers to a tag set definition file 6 to designate the meta-data on an HTML page 7 such as a prescribed shopping mail, etc., and to output the meta-data to a pattern learning part 2. The part 2 inputs the designated meta-data and learns the description pattern of the meta-data to produce a meta-data description rule 5. An automatic information collecting part 3 collects the meta-data from an HTML page 8 based on the rule 5. A description rule verification part 4 verifies the validity of the rule 5 based on the meta-data collected from the page 8 and outputs the result of this verification to the part 2. The part 2 updates the rule 5 based on the received result of verification.
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