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This paper describes an algorithm to perform keyword search over federated RDF datasets. The algorithm compiles keyword-based queries into federated SPARQL queries, without user intervention, under the assumption that the RDF datasets and the federation have a schema. The compilation process is explained in detail, including how to synthesize external joins between local queries, how to combine local queries with UNION clauses, and how to construct the WHERE and TARGET clauses. The paper thendblp:conf/er/IzquierdoCGDL17 fatcat:6b6gwy2bubb4xaq5egvvcmvj2u