OGSA-DAI 3.0 – The Whats and the Whys

OGSA-DAI provides an extensible framework that allows data resources to be incorporated into Grid fabrics. The current OGSA-DAI release, version 3.0, is a complete top-to-bottom redesign and implementation of the OGSA-DAI product. A number of fundamental conceptual and design changes are introduced in this release. In this paper we describe the motivation behind this redesign and provide an overview of OGSA-DAI 3.0, comparing and contrasting it with OGSA-DAI 2.2. We also outline the implications that these changes have for the OGSA-DAI user community.