Notations

[Ron Bourret]

Arjun Ray wrote:
> Unfortunately, this content model is the ambiguous one!
> 
> ===
> [test]$ cat ambig
> <!doctype ambig [
> <!element   ambig
>             - -
>             (p | s | (p, s))
>             >
> <!element   (p,s)
>             - -
>             (#PCDATA)
>             >
> ]>
> [test]$ nsgmls -s ambig
> nsgmls:ambig:5:28:E: content model is ambiguous: when no tokens have been
> matched, both the 1st and 2nd occurrences of "P" are possible
> nsgmls:ambig:12:1:E: no document element
> [test]$

Touché!  I'd always wondered if Appendix E had any relevance to the real world.

-- Ron

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