D4 (programming language): Difference between revisions

Revision as of 20:52, 6 September 2013

Revision as of 20:54, 10 September 2013

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Like most query languages, D4 has a [[Data Definition Language]] (DDL) and a [[Data Manipulation Language]] (DML). D4 also has an [[Imperative programming|Imperative]] Language for procedural code.

===Data definition language===

The DDL for Dataphor bears many similarities to other DBMSs, but with an obviously Pascal-like twist. Many of the allowed DDL operations, like constraints, allow [[relational operator|relational]] [[Declarative programming|declarative]] statements to be used, which many believe is superior to the procedural style operations used in [[SQL]].

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==History==

D4 was named after the similar sounding [[Dataphor]], the system that uses the language. It was some time after these names were decided that it's creators discovered [[Tutorial D]], and the coincidence it had with that name. Since discovering Tutorial D and [[The Third Manifesto]], the creators has used The Third Manifesto as a guide in making Dataphor and D4. Since then, [[Hugh Darwen]] has referred to D4, as a notable project in his talk entitled ''The Askew Wall''.<ref>[http://www.dcs.warwick.ac.uk/~hugh/TTM/TTM-TheAskewWall-printable.pdf The Askew Wall]</ref>.

==See also==