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22 November 2011

what is Heath Normal Form?

A name suggested by Chris Date for Boyce-Codd normal form

Explanation

Although Boyce-Codd Normal Form is called that because it was described in a 1974 paper detailing recent work done at IBM in the USA by Ray Boyce and Ted Codd, it was originally defined in a paper by Ian Heath (of IBM in the UK) in 1971. Because of this, Chris Date wrote "it seems to me that BCNF ought by rights to be called Heath normal form. But it isn't."
Codd, E. F. "Recent Investigations into Relational Data Base Systems." IBM Research Report RJ1385 (1974)
Heath, I. "Unacceptable File Operations in a Relational Database." Proc. 1971 ACM
SIGFIDET Workshop on Data Description, Access, and Control (1971)
Date, C.J. Database in Depth: Relational Theory for Practitioners (2005) (the quoted text is on page 142)

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