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  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 ...