منابع مشابه
A logic-based approach to data integration
An important aspect of data integration involves answering queries using various resources rather than by accessing database relations. The process of transforming a query from the database relations to the resources is often referred to as query folding or answering queries using views, where the views are the resources. We present a uniform approach that includes as special cases much of the ...
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In this work, a logic-based framework for XML data integration is proposed. XPathLogic extends the XPath language with variable bindings and embeds it into rstorder logic, interpreted over an edge-labeled graph-based data model. XPathLog is then the Horn fragment of XPath-Logic, providing a Datalog-style, rule-based language for manipulating and integrating XML data. In contrast to other approa...
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Data integration is the problem of combining data residing at different autonomous, heterogeneous sources, and providing the client with a unified, reconciled global view of these data. We discuss data integration systems, taking the abstract viewpoint that the global view is an ontology expressed in a class-based formalism. We resort to an expressive Description Logic, ALCQI, that fully captur...
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abstract type-ii fuzzy logic has shown its superiority over traditional fuzzy logic when dealing with uncertainty. type-ii fuzzy logic controllers are however newer and more promising approaches that have been recently applied to various fields due to their significant contribution especially when the noise (as an important instance of uncertainty) emerges. during the design of type- i fuz...
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ژورنال
عنوان ژورنال: Theory and Practice of Logic Programming
سال: 2002
ISSN: 1471-0684
DOI: 10.1017/s1471068401001375