During several years there has been a large investment in data collection and storage, both in small businesses and large firms. Data Warehousing provides memory to enterprises but also to industries and scientific domains. Memory of past experiences provides a base for learning, helping to diminish uncertainty and yielding results to support decisions.

In the EKDB&W workshop, both the discussion of technical issues and the presentation of applications will help to increase the experience in the domain of extracting useful and non-trivial information from large databases and data warehouses. The presentations will hopefully bridge the gap between research and practice, improving both. Invitation to industrial partners will help to project the socio-economic importance of AI.

EKDB&W is part of 12th Portuguese Conference on Artificial Intelligence - EPIA 2005, sponsored by APPIA, the Portuguese Association of AI. EKDB&W follows successful workshops EKDB-03, EKDB-01, EKDB-99, EKDB-97. The 2005 edition also intends to serve as a meeting-point for the researchers and professionals working in the areas of EKDB&W, namely in Data Warehousing, Database Marketing, Data Mining, Data Analysis and Decision Support.