Capturing Missing Tuples and Missing Values

  title={Capturing Missing Tuples and Missing Values},
  author={Ting Deng and Wenfei Fan and Floris Geerts},
  journal={ACM Trans. Database Syst.},
Databases in real life are often neither entirely closed-world nor entirely open-world. Databases in an enterprise are typically partially closed, in which a part of the data is constrained by master data that contains complete information about the enterprise in certain aspects. It has been shown that, despite missing tuples, such a database may turn out to have complete information for answering a query. This article studies partially closed databases from which both tuples and attribute… CONTINUE READING

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