On-line analysis of a web data warehouse

This paper describes the design of a system, which facilitates Accessing and Interconnecting heterogeneous data sources. Data sources can be static or active: static data sources include structured or semistructured data like databases, XML and HTML documents; active data sources include services which are localised on one or several servers including web services. The main originality of this work is to make interoperability between actives and/or static data sources based on XQuery language. As an example of using our approach, we'll give a scenario for analyzing log files basing on OLAP (On Line Analytical Processing) literature.