Re: hygiene problems in grammars

> Grammars 1 through 4 all have rules (or, more strictly, LHS+RHS pairs)
> we can class as useless, in the sense that the rule will never be
> involved in any successful derivation.  If we believe that the spec
> should require that grammars with hygiene problems should be rejected as
> non-conforming, then why are these grammars acceptable?

I now have options to allow or reject grammars with each of the four
problems you outlined. I think the spec should be consistent about them.

                                        Be seeing you,
                                          norm

--
Norm Tovey-Walsh
Saxonica