RAL: An Algebra for Querying RDF
RAL: An Algebra for Querying RDF is a scholarly work, published in 2004 in ''World Wide Web''. The main subjects of the publication include cwm, XML, SPARQL, metadata, Simple Knowledge Organization System, Semantic Web, Resource Description Framework, query optimization, RDF query language, stream processing, computer science, linked data, information retrieval, query language, and RDF Schema. The paper proposes RAL (an RDF algebra) as a reference mathematical study for RDF query languages and for performing RDF query optimization.