A multi-level relational system
Published 1 January 1975
John Mylopoulos, S. A. Schuster, D. Tsichritzis
Citations28
Generate an AI Snapshot to get a quick, structured summary of this paper.
Study Snapshot
ObjectiveStudy objective
MethodsResearch methodology
PopulationPopulation studied
Sample sizeSample sizes
OutcomesStudy outcomes here
ResultsStudy results comes here
LimitationsResearch study limitations comes here
A concise AI-generated summary of the paper will appear here once you click Generate AI Snapshot.
TL;DR
A relational data base is composed of a set of time varying relations inter-related through common domains.
Abstract
A relation can be conceptually viewed as a table of data. The table's heading defines the relation's name, the column headings are the attribute names, and each row corresponds to an n-tuple of data values describing a single entity. The set of values which can be used in a column is called a domain. A relational data base is composed of a set of time varying relations inter-related through common domains.
Keywords
Computer Science
Communications of the ACMA relational model of data for large shared data banks
4,834 Citations1983E. F. Codd
Communications of the ACMTransition network grammars for natural language analysis
1,330 Citations1970William A. Woods
SEQUEL
576 Citations1976Donald D. Chamberlin, Raymond F. Boyce
The data manipulation facility for a structured English query language (SEQUEL) which can be used for accessing data in an integrated relational data base.
Progress in natural language understanding
116 Citations1973William A. Woods
The Lunar Sciences Natural Language Information System is a research prototype of a system to deal with this and other man-machine communication problems by adapting the machine to the conventions of ordinary natural English rather than requiring the man to adapt to the machine.
Communications of the ACMGenerating English discourse from semantic networks
110 Citations1972Robert F. Simmons, Jonathan Slocum
Initial findings with regard to form determiners such as voice, form, tense, and mood, some n~es fk~r embedding sentences, and some attention to pronominal substitution are reported.
The converse natural language data management system
20 Citations1971Charles Kellogg, John F. Burger +2 more
An overview of research in progress in which a natural-language compiler has been constructed that accepts sentences in a user-extendable English subset, produces surface and deep-structure syntactic analyses, and uses a network of concepts to construct semantic interpretations formalized as computable procedures.
International Joint Conference on Artificial IntelligenceCase structure systems
6 Citations1973Bertram C. Bruce
A logic for case structure systems is presented which allows variations in the order and number of terms in atomic formulas, and a computer program which allows flexible case structures is described.