| 摘要 |
PROBLEM TO BE SOLVED: To provide a structured document retrieval method capable of performing various retrieval designations to the hierarchical structure of a document including an ambiguous path without increasing computational amount. SOLUTION: A retrieval graph containing the structure information of a document is generated on the basis of a retrieval request including the logical structure of the document (31 and 32), an optimal retrieval plan is generated by circulating the retrieval graph on the basis of a strategy for preferentially evaluating a partial graph, which can be evaluated, in the retrieval graph while utilizing an index file 5 including a data generation index for specifying the generation position of data and an element name generation index for specifying the generation position of an element name (33) and the retrieval plan is executed to a data file 4 (34). Thus, the retrieved result, with which the retrieval request is satisfied, is obtained. |
