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174
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PODS
2001
ACM
16 years 7 months ago
2001
ACM
The paper investigates XML document speci cations with DTDs and integrity constraints, such as keysand foreign keys. We study the consistency problem of checking whether a given s...
198
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PODS
2004
ACM
16 years 7 months ago
2004
ACM
We study the problem of answering queries over sources with limited access patterns. Given a first-order query Q, the problem is to decide whether there is an equivalent query whi...
170
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PODS
2006
ACM
16 years 7 months ago
2006
ACM
Given that most elementary problems in database design are NP-hard, the currently used database design algorithms produce suboptimal results. For example, the current 3NF decompos...
182
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PODS
2007
ACM
16 years 7 months ago
2007
ACM
In [3], we introduced a framework for querying and updating probabilistic information over unordered labeled trees, the probabilistic tree model. The data model is based on trees ...
202
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PODS
2008
ACM
16 years 7 months ago
2008
ACM
We introduce a theoretical framework for discovering relationships between two database instances over distinct and unknown schemata. This framework is grounded in the context of ...