Explaining ambiguity in a formal query language

The problem of generating reasonable natural language-like responses to queries formulated in nonnavigational query languages with logical data independence is addressed. An extended ER model, the Entity-Relationship-Involvement model, is defined which assists in providing a greater degree of logica...

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Veröffentlicht in:	ACM transactions on database systems 1990-06, Vol.15 (2), p.125-161
Hauptverfasser:	Wald, Joseph A., Sorenson, Paul G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Computer science control theory systems Data management systems Data model extensions Database design and models Database management system engines Database query processing Database query processing and optimization (theory) Database theory Exact sciences and technology Information systems Information systems. Data bases Memory organisation. Data processing Query languages Software Theory and algorithms for application domains Theory of computation
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