Generating English discourse from semantic networks
Communications of the ACM
A relational model of data for large shared data banks
Communications of the ACM
Transition network grammars for natural language analysis
Communications of the ACM
The converse natural language data management system: current status and plans
SIGIR '71 Proceedings of the 1971 international ACM SIGIR conference on Information storage and retrieval
SEQUEL: A structured English query language
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
Progress in natural language understanding: an application to lunar geology
AFIPS '73 Proceedings of the June 4-8, 1973, national computer conference and exposition
Sibyl: a relational database system with remote-access capabilities
AFIPS '84 Proceedings of the July 9-12, 1984, national computer conference and exposition
TORUS: a natural language understanding system for data management
IJCAI'75 Proceedings of the 4th international joint conference on Artificial intelligence - Volume 1
Data structures and data accessing in data base systems past, present, future
IBM Systems Journal
Storage and access in relational data bases
IBM Systems Journal
SEQUEL 2: a unified approach to data definition, manipulation, and control
IBM Journal of Research and Development
An overview of recent data base research
ACM SIGMIS Database
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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.