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Issue No.07 - July (1988 vol.14)
pp: 959-984
<p>An underlying relational database model and the database query language SQL are assumed, and methods are presented for responding with appropriate answers to null value responses. This is done by using a knowledge base based on RM/T, an extended relational model. The advantages of this approach are described. To demonstrate the utility of the knowledge base model, a simple knowledge base is constructed. The algorithms that provide additional information when a null answer is returned are detailed.</p>
user interfaces; knowledge engineering; quality responses; natural language interfaces; relational database model; query language; SQL; null value responses; knowledge base; RM/T; extended relational model; knowledge engineering; natural languages; query languages; relational databases; user interfaces
M. Kao, N. Cercone, W.S. Luk, "Providing Quality Responses with Natural Language Interfaces: The Null Value Problem", IEEE Transactions on Software Engineering, vol.14, no. 7, pp. 959-984, July 1988, doi:10.1109/32.42738
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