On Aug 22, 2010, at 18:11, John R. Ehrman wrote:
>
> (1) =0C'a' is an illegal literal; zero lengths are invalid.
>
I thought the 0 was a duplication factor, not a length modifier.
But, yes, I now see the RM says:

    1. A duplication factor of zero is permitted, except
       for literals, ...

And, elsewhere, as I knew from experience:

    The length modifier  ...  must have a positive value.

Thanks,
gil

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