The project aims at both investigating
the theoretical foundations of data integration in a peer-to-peer
networking environments, as well as developing techniques and a
prototype implementation for query answering in peer-to-peer systems.
Specifically, the expected results are the following:
- Methodology
for data integration in a peer-to-peer networking environment.
This methodology aims at specifying both the architecture of a single
peer, and how a peer exchanges information with other peers.
Specifically, we envision a framework in which each peer exports its
data in terms of a schema visible to other peers, and is equipped with
two kinds of mappings, called local and peer-to-peer, respectively.
Local mappings specify how data sources that are local to the peer are
linked to the peer schema. Peer-to-peer mappings specify how views over
one peer schema are related to views over other peer schemas. Each peer
specifies its mappings to other peers autonomously. As a consequence, a
distinguishing feature of our approach is not to limit in any way the
topology of the peer-to-peer network.
- Semantic
characterization.
We aim at investigating different methods for specifying formal
semantics of the framework outlined above, comparing their
characteristics, and selecting the method best suited for devesing
effective query answering techniques.
- Query
answering algorithms in peer-to-peer data integration.
Another distinguishing feature of our approach is that the query
answering algorithms will be proved to be sound and complete with
respect to the semantic characterization mentioned above.
- Implementation via web services.
The whole framework, including
the query answering algorithms will be implemented on a web-service
based platform.
Presentations
- Slides
of the talk by Maurizio Lenzerini at the International Workshop on Databases,
Information Systems, and P2P Computing, Berlin,
Germany, September 2003.
- Slides of the
invited tutorial on "Data integration: A
theoretical perspective", by Maurizio Lenzerini, at
the 21st ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database
Systems, PODS 2002, Madison, Winsconsin, USA, June 2002.
Publications
People
Links
- Related projects:
- Related papers:
- Alon Halevy, Zack Ives, Dan Suciu and Igor Tatarinov. "Schema
Mediation in Peer Data Management Systems". Proceedings of the
International Conference on Data Engineering, ICDE, 2003.
- Luciano Serafini, Fausto Giunchiglia, John Mylopoulos, Philip
A. Bernstein. "Local Relational Model: A Logical Formalization of
Database Coordination". CONTEXT
2003.
Pagina a cura di
Maurizio Lenzerini
Ultima modifica: 23/09/2003