The Ultrawrap Project

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Overview

There is a huge gap between the Semantic Web and Database community. However in recent years, we are starting to see interest from the Database community in the data management aspects of the Semantic Web. The databases to manage Semantic Web data, called triple stores, can be created using relational databases as the backend. However current triple-stores with relational backend have poor performance. The research problem is to identify other ways to take advantage of the existing relational database infrastructure.

Ultrawrap: A Virtual Triple-store for Semantic Web Data Management

We have created a novel approach that exposes legacy data in relational databases as a triple-store without the need of replicating the data. Our approach demonstrated that existing commercial SQL query engines already subsume all the algorithms need to support effective query rewriting from the SPARQL language (query language for the Semantic Web) to SQL. Furthermore, our experimental results showed that our approach is better than all other existing triple-stores.

We expect to release an alpha version of our software by the end of 2009

Morphster Poster

Publications

  • Powerpoint for RDB2RDF standards committee presentation.pdf
  • Sequeda, J F. Depena, R. Miranker, D. (2009) Ultrawrap: Using SQL Views for RDB2RDF. Poster in the 8th International Semantic Web Conference (ISWC2009). Washington DC, US [pdf] [Poster]
  • Sequeda, J F. Garcia-Castro, A. Corcho, O. Tirmizi, S. Miranker, D. (2009) Overcoming database heterogeneity to facilitate social networks: the Colombian displaced population as a case study. Invited Paper at the 18th World Wide Web Conference (WWW2009). WWW in Iberoamerica Track. Madrid, Spain [pdf]
  • Sahoo, S. Halb, W. Hellmann, S. Idehen, K. Thibodeau, T. Auer, S. Sequeda, J F. Ezzat, A. (2009)A Survey of Current Approaches for Mapping of Relational Databases to RDF . W3C RDB2RDF XG Report [pdf]
  • Sequeda, J F. Trimizi, S.H. Corcho, O. Miranker, D.P. (2009) Direct Mapping SQL Databases to the Semantic Web. Technical Report 09-04. The University of Texas at Austin, Department of Computer Sciences. [pdf]
  • Sequeda, J F. Tirmizi, S. Miranker, D. (2008) A Bootrstrapping Architecture for Integration of Relational Databases to the Semantic Web. Poster in the 7th International Semantic Web Conference (ISWC2008). Karlsruhe, Germany [pdf] [Poster]
  • Tirmizi, S. Sequeda, J F. Miranker, D. (2008) Translating SQL Applications to the Semantic Web. In Proceedings of the 19th International Databases and Expert Systems Application Conference (DEXA2008). Turin, Italy [pdf]
  • Sequeda, J F. Tirmizi, S. Miranker, D. (2007) SQL Databases are a Moving Target. Position Paper for W3C Workshop on RDF Access to Relational Databases. Cambridge, MA, USA [pdf]

People

Quick Links

Papers

Web Services

  • coming soon:
  • SQL-DDL --> OWL

Download

  • coming soon:
  • Ultrawrap for SQL Server