Boolean query mapping across heterogeneous information sources
نویسندگان
چکیده
منابع مشابه
Boolean Query Mapping Across Heterogeneous Information Sources
Boolean Query Mapping Across Heterogeneous Information Sources Kevin Chen-Chuan Chang, Hector Garcia-Molina, Andreas Paepcke* Abstract---Searching over heterogeneous information sources is difficult because of the non-uniform query languages. Our approach is to allow a user to compose Boolean queries in one rich front-end language. For each user query and target source, we transform the user qu...
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Searching over heterogeneous information sources is di cult because of the non-uniform query languages. Our approach is to allow a user to compose Boolean queries in one rich front-end language. For each user query and target source, we transform the user query into a subsuming query that can be supported by the source but that may return extra documents. The results are then processed by a lte...
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In this paper we present a mechanism for approximately translating Boolean query constraints across heterogeneous information sources. Achieving the best translation is challenging because sources support different constraints for formulating queries, and often these constraints cannot be precisely translated. For instance, a query [s ore > 8] might be “perfectly” translated as [rating > 0.8] a...
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Searching over heterogeneous information sources is di cult because of the non-uniform query languages. Our approach is to allow a user to compose Boolean queries in one rich front-end language. For each user query and target source, we transform the user query into a subsuming query that can be supported by the source but that may return extra documents. The results are then processed by a lte...
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ژورنال
عنوان ژورنال: IEEE Transactions on Knowledge and Data Engineering
سال: 1996
ISSN: 1041-4347
DOI: 10.1109/69.536244