Hierarchical knowledge-oriented specification for information integration

We present a novel methodology for manipulating sources in a knowledge integration scenario. Firstly, we define and exploit an appropriate data model, namely Knowledge Oriented Specification, to represent and to query data sources without having to align their background knowledge. Secondly, we propose a structured knowledge representation formalism, namely Layered Conceptual Graphs, which present the data at different levels of detail. We explain how the two formalisms can be jointly used to provide a hierarchical approach to integration.

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