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> > 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. What schema language supports :alnum: or \a? David
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