It's supposed to exclude the escaped ampersand, escaped less than and the space
character.
--- In rng-users@yahoogroups.com, "G. Ken Holman" <gkhol...@...> wrote:
>
> At 2009-12-21 02:40 +0000, dan.isla wrote:
> >I was wondering if it was possible to do a negative look-ahead
> >pattern match with Relax NG.
> >
> >I am trying to exclude certain strings. The pattern works fine in
> >other languages (Ruby) but fails with RNG.
> >
> >Here is my definition:
> >
> >xsd:string { pattern = "^(?!^.*((&)|(<)| ).*$).*$" }
>
> That doesn't look correct to me ... are you not missing a third
> operand in the embedded expression?
>
> ((&)|(<)| )
>
> ... that is the choice between an ampersand, a less-than, and what?
>
> Mind you, that is just with visual inspection ... I haven't tried to
> run it with software. (and it is early in the morning so I might be
> missing something!)
>
> I hope this helps.
>
> . . . . . . . . . . Ken
>
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