Semantic Web Pipes

This report presents Semantic Web pipes, a powerful paradigm to build RDF-based mashups. Semantic Web pipes work by fetching RDF models on the Web, operating on them, and producing an output which is itself accessible via a stable URL. We illustrate how Semantic Web pipes can solve use cases ranging from simple aggregation to complex collaborative editing and filtering of distributed RDF graphs. To this end, we introduce the concept of RDF revocations and describe a pipe operator that can apply such revocations. This operator enables Semantic Web pipes where agents cooperatively develop semantically structured knowledge, while still retaining and publishing their individual contributions and beliefs. We conclude with a description of two available implementations. SeMedia Group, Univ. Politecnica delle Marche, Ancona, Italy. E-mail: [email protected] DERI, National University of Ireland, Lower Dangan, Galway, Ireland. E-mail: [email protected] DERI, National University of Ireland, Lower Dangan, Galway, Ireland. E-mail: [email protected] DERI, National University of Ireland, Lower Dangan, Galway, Ireland. E-mail: [email protected] Acknowledgements: This work has been supported by the European FP6 project inContext (IST-034718), by Science Foundation Ireland under the Lion project (SFI/02/CE1/I131), and by the European project DISCOVERY(ECP-2005-CULT-038206). Some preliminary results have been published in Proceedings of the ISWC’07 Workshop on New forms of Reasoning for the Semantic Web, Busan, Korea, November 11, 2007. Copyright c © 2007 by the authors DERI TR 2007-11-07 2