The ORION database system (previously known as U-DBMS), developed by the database group of Purdue University, is a state-of-the-art uncertain database management system with built-in support for probabilistic data as first class data types. In contrast to other uncertain databases, Orion supports both attribute and tuple uncertainty with arbitrary correlations. This enables the database engine to handle both discrete and continuous pdfs in a natural and accurate manner. The underlying model is closed under the basic relational operators and is consistent with Possible Worlds Semantics.
Probabilistic and uncertain data management have recently received much attention
in the database community. Uncertainty is
prevalent in numerous application domains, ranging from information extraction
and integration to scientific data management and sensor databases. Orion is a
general-purpose uncertain database system that unifies the modeling of
probabilistic data across applications. This in turn provides additional
opportunities to the database engine for indexing and optimization.
It is built on top of PostgreSQL,
an object-oriented relational open-source database
system. The novel features of ORION are:
This material is based upon work supported by the National Science Foundation (NSF) under Grant No: IIS-0534702 , The Air Force Office of Scientific Research (AFOSR) and National Science Foundation (NSF) REU under Grant No. 0939724.
The image of Orion is taken by high schools students from Amtsgymnasiet I Sønderborg High School in Denmark. This picture is protected by Copyright and is available here. It is copied here with permission.
Any opinions, findings and conclusions or recomendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation (NSF) or the Air Force Office of Scientific Research (AFOSR).