Peer Data Management System
نویسنده
چکیده
MAIN TEXT A Peer Data Management System (PDMS) is a distributed data integration system providing transparent access to heterogeneous databases without resorting to a centralized logical schema. Instead of imposing a uniform query interface over a mediated schema, PDMSs let the peers define their own schemas and allow for the reformulation of queries through mappings relating pairs of schemas (see Figure 1). PDMSs typically exploit the schema mappings transitively in order to retrieve results from the entire network.
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