DATA AGGREGATING METHOD, AND RECORDING MEDIUM RECORDED WITH EXECUTION PROGRAM FOR THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a data aggregating method which can aggregate data while a user request is reflected without any limitation to a specific domain and releases a user from data selection and aggregation. SOLUTION: A propagation network is previously structured on the basis of observation data tables which contain observed values, domain layer knowledge, and inter-domain relation knowledge. According to a meaning-framed user request, a candidate data table which hold necessary data is specified among the observation data tables. For a node corresponding to the candidate key property of the candidate data table, a token is propagated to a node whose granularity matches a domain of each drawing element which is not a quantity scale along links of the propagation network. When it is reachable, aggregation possibility is judged and properties corresponding to the nodes that the token passes through are coupled in the candidate data table; and data tuples are taken out according to restriction conditions of the meaning frame and the same tuples are put together to aggregate data.