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Time and Relational Theory by Nikos Lorentzos, Hugh Darwen, C.J. Date

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Appendix D

A Tutorial D Grammar

This appendix gives a simple BNF grammar for Tutorial D relational expressions and assignments.

Keywords: Tutorial D; The Third Manifesto

I never use a big, big D

—W. S. Gilbert:

HMS Pinafore (1878)

This appendix gives for purposes of reference a simple BNF grammar for Tutorial D relational expressions and assignments (only). The grammar is derived from the comprehensive version given in reference [50] but additionally takes account of image relations, which aren’t mentioned in that reference.1 Note: For space reasons, certain of the syntactic categories mentioned in this grammar have names that are slightly abbreviated compared to their counterparts in the body of the book (e.g., <relation selector> instead of ...

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