A relational model of data for large shared data banks
Communications of the ACM
REL: A Rapidly Extensible Language system
ACM '69 Proceedings of the 1969 24th national conference
PRTV, an efficient implementation for large relational data bases
VLDB '75 Proceedings of the 1st International Conference on Very Large Data Bases
USAGE: generating interactive application programs from grammatical descriptions
ACM SIGMIS Database - Proceedings of a conference on Application Development Systems, Santa Clara, California, March 10-11, 1980
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Basic considerations in designing a natural data base query language system are discussed. The notion of the noun-phrase data model is elaborated, and its role in making a query system suitable for general use is stressed. An experimental query system, Yachimata, embodying the concept, is described.