A classic comedy routine, "Who's On First" by Abbott and Costello, was performed many times in the early 1950s.1 The humor comes when the listener realizes that the actors are using the same words but with entirely different meanings. The noise level increases and the frustration mounts as Abbott and Costello struggle fruitlessly to achieve a coherent conversation.

Unfortunately, I have the same feeling about a defining issue in business intelligence (BI) and data warehousing (DW). The goal of DW and now enterprise information integration (EII) is a single version of business reality by consolidating content so that business processes appear consistently across disparate information sources.2 On the other hand, the goal of enterprise application integration (EAI) is a single version of business reality by consolidating functionality so that business processes interact seamlessly across disparate application systems.

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