> In my ideal world the syntax would evolve so you could constrain the
categories -- "\p{Pd except '-'}", "any character that is some kind of
dash except for U+002D "hyphen-minus", for example -- since that would
make this even more useful for functions that take regular expressions
such as tokenize().
XPath regular expressions allow a subtraction operator within a
character class:
[\p{Lu}-[IO]]
allows any upper case letter except I or O.
Michael Kay
Saxonica
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