Abstract
Web communities involve networks of loosely coupled data sources. Members in those communities should be able to pose queries and gather results from all data sources in the network, where available. At the same time, data sources should have limited restrictions on how to organize their data. If a global schema is not available for such a network, query processing is strongly based on the existence of (hard to maintain) mapping rules between pairs of data sources. If a global schema is available, local schemas of data sources have to follow strict modelling restrictions posed by that schema.
In this paper, we suggest an architecture to provide better support for distributed data management in loosely coupled data sources. In our approach, data sources can maintain diverse schemas. No explicit mapping rules between data sources are needed to facilitate query processing. Data sources can join and leave the network any time, at no cost for the community. We demonstrate our approach, describing SDQNET, a prototype platform to support semantic query processing in loosely coupled data sources.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Kokkinidis, G., Christophides, V.: Semantic Query Routing and Processing in P2P Database Systems: The ICS-FORTH SQPeer Middleware. In: Proc. of the P2P DB 2004 International Workshop, Heraklion, Greece (2004)
Halevy, A.Y., Ives, Z.G., Mork, P., Tatarinov, I.: Piazza: Data Management Infrastructure for Semantic Web Applications. In: Proc. of the WWW 2003 International Conference, Budapest, Hungary (2003)
Nejdl, W., Wolf, B., Qu, C., Decker, S., Sintek, M., Naeve, A., Nilsson, M., Palmer, M., Risch, T.: EDUTELLA: A P2P Networking Infrastructure based on RDF. In: Proc. of the WWW 2002 International Conference, Honolulu, Hawaii, USA (2002)
Karvounarakis, G., Alexaki, S., Christophides, V., Plexousakis, D., Scholl, M.: RQL: A Declarative Query Language for RDF. In: Proc. of the WWW 2002 International Conference, Honolulu, Hawaii, USA (2002)
Alexaki, S., Cristophides, V., Karvounarakis, G., Plexousakis, D., Tolle, K.: The ICS-FORTH RDFSuite: Managing Voluminous RDF Description Bases. In: Proc. of the SemWeb 2001 International Workshop, Hong-Kong (2001)
Kaoudi, Z., Dalamagas, T., Sellis, T.K.: RDFSculpt: Managing RDF Schemas Under Set-Like Semantics. In: Gómez-Pérez, A., Euzenat, J. (eds.) ESWC 2005. LNCS, vol. 3532, pp. 123–137. Springer, Heidelberg (2005)
W3C Recommendation. XML Schema Part 2: Datatypes, 2nd edn. (2004) http://www.w3.org/TR/xmlschema-2/
W3C Recommendation. RDF Primer (2004), http://www.w3.org/TR/rdf-primer/
Motro, A.: Superviews: Virtual Integration of Multiple Databases. IEEE Transactions on Software Engineering 13(7) (1987)
Garcia-Molina, H., Papakonstantinou, Y., Quass, D., Rajaraman, A., Sagiv, Y., Ullman, J., Vassalos, V., Widom, J.: The TSIMMIS approach to mediation: Data models and Languages. In: Journal of Intelligent Information Systems (1997)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2006 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Spyropoulou, E., Dalamagas, T. (2006). SDQNET: Semantic Distributed Querying in Loosely Coupled Data Sources. In: Manolopoulos, Y., Pokorný, J., Sellis, T.K. (eds) Advances in Databases and Information Systems. ADBIS 2006. Lecture Notes in Computer Science, vol 4152. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11827252_7
Download citation
DOI: https://doi.org/10.1007/11827252_7
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-37899-0
Online ISBN: 978-3-540-37900-3
eBook Packages: Computer ScienceComputer Science (R0)