Three Schema Approach
The three-schema approach, or the Three Schema Concept, in software engineering is an approach to building information systems and systems information management from the 1970s. It proposes to use three different views in systems development, in which conceptual modelling is considered to be the key to achieving data integration.
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“I maintain that Truth is a pathless land, and you cannot approach it by any path whatsoever, by any religion, by any sect.”
—Jiddu Krishnamurti (1895–1986)