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Abstract : |
Abstract: We introduce ESCHER, a prototype database system based on the extended non-first-normal-form data model. The nested table approach is the paradigm for the graphical interface which allows browsing, editing and querying the database. Interaction is achieved by fingers generalizing the well-known cursor concept. We focus on interactive query formulation for nested tables in a QBE-like fashion which is suitable for ad-hoc queries by casual users. The paper closes with examples of nontextual data types which are seamlessly integrated into the data model and the interface. 1, |
