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  • × author_ss:"Xu, L."
  • × language_ss:"chi"
  1. Wei, M.; Xu, L.: Boolean mapping algorithms across heterogeneous information sources (1998) 0.00
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    Abstract
    Notes the difficulties of searching over heterogeneous information sources where query languages are not unifrom. Presents a model where Boolean queries are composed in one rich front end language. For each query and target source, the query is transformed into a subsuming query that can be supported by the source but may return extra documents. The results are then processed by a filter query to yield the correct results
    Source
    Journal of the China Society for Scientific and Technical Information. 17(1998) no.3, S.185-189