| 摘要 |
PURPOSE: An index structure for an RDF(Resource Description Framework) triple repository is provided to rapidly output an index query result against user's various queries. CONSTITUTION: If a query based on S or -S value is inputted about the SPO index(200), leaf nodes based on S or -S value are detected from a plurality of SPOs or -SOP leaf nodes, and leaf nodes arranged to PO or the OP value are returned as a result of the query(206). If a query based on P or -P value is inputted about the POS index, leaf nodes based on P or -P value are detected from a plurality of POS or -POS leaf nodes, and leaf nodes arranged to OS or SO value are returned as a result of the query.
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