| Budget Amount *help |
¥26,780,000 (Direct Cost: ¥20,600,000、Indirect Cost: ¥6,180,000)
Fiscal Year 2014: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2013: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2012: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
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| Outline of Final Research Achievements |
Linked Data is expected as resources where value information is buried. However, it's too hard to search answers from the entire Linked Data efficiently because large and high cost join operations are frequently occurred for such a query. To address such a problem, we proposed novel techniques. In particular, storing approach that can skip join operations based on structure of RDF documents, and join algorithm that can avoid unnecessary data reading for the low-selectivity join. We evaluated the performance of our approaches through a series of experiments using large data set.
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