Efficient Virtual Data Integration Based on XML.
In the scope of increased interest to the problem of integrating disparate heterogenous data sources, virtual approach seems to be quite perspective nad promising. In the general formulation this problem is extremely difficult to solve and has paid little attention so far. However the rapid evolution of XML - the multipurpose format for data representation - and elaboration of XML data query languages such as XQuery gives a new outlook on the old problem.
This paper contains a description of the overall architecture and foundations of BizQuery - the virtual integration system based on XML data model. The system maps local sources as views on the global scheme and allows users to query data in terms of XML and UML via declarative languages XQuery and UQL in a uniform way. The problems of scheme mapping, query optimisation, decompositopn and processing in the case of virtual integration are touched upon.Full text of the paper in pdf
7th East-European Conference on Advances in Databases and Information Systems (ADBIS), 2003.