| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that information cannot be acquired unless an extraction method is predefined from information created in a free format.SOLUTION: Information can be acquired without predefining a rule by a database construction device 1 equipped with: a main set storage section 101 in which a main set which is a set of attribute values with m types (m is an integer equal to or more than 3) of different attributes can be stored; a rule acquisition section 102 which acquires a rule for acquiring a subset which is a set of attribute values of n types (n is an integer equal to or more than 2, and equal to or less than (m-1)) of attributes from one or more pieces of text information including the subset among the attribute values of the main set which is stored in the main set storage section 101; a subset storage section 105 in which the subset can be stored; and a subset acquisition section 104 which acquires the subset from one or more pieces of text information by using the rule acquired by the rule acquisition section 102, and accumulates the acquired subset in the subset storage section 105. |
