Volume : II, Issue : I, January - 2013

Uncertainty Lineage Databases with Confidence Value

Mr. Vishal K. Pandya, Dr. Dhaval R. Kathiriyac

Abstract :

Uncertainty Lineage Databases model with confidence [probability] values. In ULDBC every tuple alternative in a base relation is coordinate with a numerical confidence value, defining the likelihood of it being present in a possible instance. Those are complete with respect to sets of possible instances with probability distributions over them. The computation of confidence values on query results, using the confidence values f base data. Instead of computing confidence during query processing compute they afterwards based on lineage. This approach enables a wider space of query plans to be selected from and it permits selective computations when not all confidence values are needed. It provides confidence computations algorithms for single data items, as well as efficient batch algorithm to compute confidence for an entire relation or database.

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Mr. Vishal K. Pandya,Dr. Dhaval R. Kathiriyac Uncertainty Lineage Databases with Confidence Value International Journal of Scientific Research, Vol.II, Issue.I January 2013

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