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On Fri, Jan 30, 2004 at 12:02:46AM +0400, David Tolpin wrote:
> Some schema languages use string regular expressions [...]
>
> Providing a structured syntax, similar to that for XML, would help
> reading and debugging them, for example,
> local-part = "(" atoms "|" person ")"
> domain = "(" atoms "|" location ")"
> start = "(" comment " )?" local-part "@" domain "( " comment ")?"
If Perl 6 ends up getting traction I think we'll see a stronger
move for this, because Perl 6 regular expressions support an
EBNF-style syntax and context-free (or context-sensitive) grammars
are integrated into regular expressions.
I'll also note you can simplify your specific pattern using character
classes, e.g. :alnum: or \a (depending on the schema language), at
some minor possible cost in portability.
Liam
--
Liam Quin, W3C XML Activity Lead, http://www.w3.org/People/Quin/
http://www.holoweb.net/~liam/
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