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K. Ari Krupnikov wrote:
>
> David Tolpin <dvd@davidashen.net> writes:
>
> > > I'm having a blackout. Is (para+|(para*, summary)) deterministic?
> >
> > No, it is not.
> >
> > > What I want is at least one element, at most one summary,
> and if a
> > > summary appears, it should be the last element.
> >
> > (para*,(para|summary))
>
> Hm, how would <para/><para/><para/> match this? The three
> paras would match "para*", and then there would be nothing to
> satisfy "para|summary".
>
> Is (a*, a) satisfiable at all? It reads as "forever and one day".
If you want one or more <P> followed by an optional <S>, you can use:
(P, P*, S?)
which, once expressed in XML Schema, does not violate the UPA.
Alessandro
>
> Ari.
>
> --
> Elections only count as free and trials as fair if you can
> lose money betting on the outcome.
>
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