Answering queries using views (extended abstract)
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Answering queries using templates with binding patterns (extended abstract)
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Query caching and optimization in distributed mediator systems
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Rewriting queries using views in description logics
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Answering recursive queries using views
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Complexity of answering queries using materialized views
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Rewriting aggregate queries using views
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Rewriting of regular expressions and regular path queries
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Query rewriting for semistructured data
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Testing implications of data dependencies
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View-based query processing for regular path queries with inverse
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On Answering Queries in the Presence of Limited Access Patterns
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A Scalable Algorithm for Answering Queries Using Views
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Answering Queries with Aggregation Using Views
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Answering Queries Using Views over Description Logics Knowledge Bases
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View-based query answering is the problem of answering a query based only on the precomputed answers to a set of views. While this problem has been widely investigated in databases, it is largely unexplored in the context of Description Logic ontologies. Differently from traditional databases, Description Logics may express several forms of incomplete information, and this poses challenging problems in characterizing the semantics of views. In this paper, we first present a general framework for view-based query answering, where we address the above semantical problems by providing two notions of view-based query answering over ontologies, all based on the idea that the precomputed answers to views are the certain answers to the corresponding queries. We also relate such notions to privacy-aware access to ontologies. Then, we provide decidability results, algorithms, and data complexity characterizations for view-based query answering in several Description Logics, ranging from those with limited modeling capability to highly expressive ones.