Précédent : Références Remonter : Projet VERSO
Précédent : Références Remonter : Projet
VERSO
The objective of the Verso group is to develop novel solutions to problems of database management. We study both practical and theoretical aspects. This year, we mainly focused on the problems generated by the mass of heterogeneous multimedia information available on the Web. Among the many potential topics offered by this new context, we selected two. We work on developping softwares for (i) new multimedia applications and (ii) geographicaly distributed heterogeneous data applications. We also continue our work on (iii) the improvement of object-oriented database systems and (iv) the fundamental aspects of models and languages.
Our work on multimedia data concerns space-time and textual
data. For the former kind, we are developping a system based on
previous theoretical work on the constraint model. Concerning
textual data, we extended the O 
database
system so as to be able to load/unload/query SGML documents.
In order to integrate heterogeneous data, one has to define the correspondance/mapping between data under different formats. We are developping a software allowing to do this in a declarative manner. The next step is the development of a graphical interface. Our other topics of research in this area concerns the interrogation of the data available on the Web and the interrogation of the database from the Web. For this we study new models, languages and optimization techniques.
Our work on object-oriented database systems concerns the
development of new tools for sophisticated schema updates, the
integration/migration of relational legacy data and, in
collaboration with O Technology, the
reuse of existing relational tools, the improvement and
implementation of the OQL standard query language.
The theoretical part of the research done at Verso is
concerned with understanding the fundamental aspects of database
models and their links with the development of new tools. An
important direction of research is the study of the complexity
and expressiveness of database languages, taking into account
aspects such as new data types and non-determinism.
Keywords: database model, database theory, query optimization,
object-oriented database, multimedia base, geographic database,
deductive database, electronic documents, virtual documents,
World Wide Web, Genome.
Some scientific cooperations: participation in Esprit IV OPAL
and Wire projects, in TMR network Chorochronos, in the Ercim
group for databases; participation in two joint EC-NSF contracts;
involvement in Franco-Chinese advanced research programs,
collaboration with the Hebrew and Tel Aviv Universities.
Précédent : Références Remonter : Projet VERSO