Flavio Rizzolo  PhD Candidate Database Group Department of Computer Science University of Toronto

I was born in Buenos Aires, Argentina, and received my MSc degree in 2001 from the University of Toronto working under the supervision of Alberto Mendelzon. I spent 2001 as a Research Associate of the Department of Computer Science and Bell University Labs, and I started my PhD with Prof. Mendelzon in 2002. In 2006/2007 I was a visiting student at the IBM Center for Advanced Studies (CAS) in Toronto. I am currently finishing my PhD under the supervision of Renée J. Miller. My research interests span theoretical and practical aspects of managing large volumes of complex, heterogeneous data. I am particularly interested in schema mapping for data integration and exchange, ontology mapping for semantic integration, as well as structural summaries for metadata management and query evaluation in XML collections.
 

Active Research Projects

• DescribeX: A framework for constructing heterogeneous XML summaries where each set in the partition can be declaratively defined and manipulated by means of path regular expressions on axes, or axis path regular expressions (AxPREs). AxPREs specify declarative mappings between instance nodes and summary nodes. DescribeX also provides a mechanism for adapting AxPRE summaries to XPath query workloads.

• Temporal XML: A proposal for modeling and implementing temporal data in XML. It includes a framework for summarizing metadata in temporal XML documents that adds the time dimension to paths summarization schemes. 

Past Research Projects

• XPlainer: A language for providing visual explanations of XPath queries. XPlainer-Eclipse, a tool that implements visual explanations using Java and Eclipse, can be found here.

• ToX (the Toronto XML Server): A repository of XML data and metadata that supports real and virtual XML documents.

Publications

• Temporal XML: Modeling, Indexing, and Query Processing.  F. Rizzolo, A. Vaisman. To appear in the International Journal on Very Large Data Bases (VLDB Journal). Also available at VLDBJ Online First.

• AxPRE Summaries: Exploring the (Semi-)Structure of XML Web Collections. M. P. Consens, F. Rizzolo, A. Vaisman. To appear in the 24th International Conference on Data Engineering (ICDE). Cancún, México. April 2008.

• Fast Answering of XPath Query Workloads on Web Collections. M. P. Consens, F. Rizzolo. Fifth International XML Database Symposium (XSym), in conjunction with VLDB 2007. University of Vienna, Austria, September, 2007.

• Visualizing Structural Patterns in Web Collections. M.S. Ali, M. P. Consens, F. Rizzolo. 16th International World Wide Web Conference (WWW). Banff, Canada. May 2007.

• XPlainer: Visual Explanations of XPath Queries. M. P. Consens, J. W. S. Liu, F. Rizzolo. 23rd International Conference on Data Engineering (ICDE). Istanbul, Turkey. April 2007.

• Self Managing Top-k (Summary, Keyword) Indexes in XML Retrieval. M. P. Consens, X. Gu, Y. Kanza, F. Rizzolo. First International Workshop on Ranking in Databases (DBRank), in conjunction with ICDE 2007. Istanbul, Turkey. April 2007.

• Efficient, Effective and Flexible XML Retrieval Using Summaries. M.S. Ali, M. P. Consens, X. Gu, Y. Kanza, F. Rizzolo, R. Stasiu. 5th International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX). Schloss Dagstuhl, Germany. December 2006.

• Indexing Temporal XML Documents. A. Mendelzon, F. Rizzolo, A. Vaisman. 30th International Conference on Very Large Data Bases (VLDB). Toronto, Canada. September 2004.

• Indexing XML Data with ToXin. F. Rizzolo, A. Mendelzon. Fourth International Workshop on the Web and Databases (WebDB), in conjunction with ACM SIGMOD 2001. Santa Barbara, CA. May 2001. 

• ToX: The Toronto XML Engine. D. Barbosa, A. Barta, A. Mendelzon, G. Mihaila, F. Rizzolo, P. Rodriguez-Gianolli. First International Workshop on Information Integration on the Web. Rio de Janeiro, Brazil. April 2001. 

• ToXin: An Indexing Scheme for XML Data. F. Rizzolo. M.Sc. Thesis, Department of Computer Science, University of Toronto, Canada. January 2001.

• Relación Tiempo Paralelo-Espacio Secuencial: Problemas relativos a la conectividad en grafos dirigidos en espacio O(log²n). S. Escudero, F. Rizzolo, J. M. Turull Torres. Revista de la Sociedad Chilena de Ciencia de la Computación 3, June 1998.

Links
 

Last Updated: January 2008.