Session 7: Overview

Abstract

The first paper in the final session was „Event Storage and Federation using ODMG“ by Jean Bacon, Alexis Hombrecher [AH], Chaoying Ma, Ken Moody and Walt Yao from Cambridge University, and was presented by Alexis. This proposes a way of handling events in a distributed object-oriented environment using the ODMG standard. They advocate storage and query facilities for events to adequately support event-driven applications. ODL is used to keep metadata on event types, stored with events in an object-oriented database. This enables new objects to be discovered dynamically and added to running systems. Hierarchies in event schemas permit translating between different domains in federated semantically heterogeneous event systems. Through stored metadata, contracts between domains can be created and used for event translation. In this way heterogeneous systems can be used together in a federation for tracking and analysing events across multiple application domains.