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Two major forms of information integration, federation and materialization, continue to dominate the market, embedded in separate products, each with their strengths and weaknesses. Application developers must make difficult choices among techniques and products, choices that are hard to change later. The authors propose a new design principle, Integration Independence, for integration engines. Integration independence frees the application designer from deciding how to integrate data. Then they describe a new, adaptive information integration engine that provides the ability to index base data or to materialize transformed data, giving them flexible platform for experimentation.
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