** Summary changed:

- regex "range subtraction" not supported
+ regex "range subtraction" not supported for ICU

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  regex "range subtraction" not supported for ICU

Status in Zorba - The XQuery Processor:

Bug description:
  XQuery regular expressions are based on those specified by "XML Schema
  Part 2: Datatypes Second Edition," Appendix F, "Regular Expressions."
  Said regexps support "Character Class Subtraction" as specified in
  section F.1, "[16] charClassSub."

  Zorba currently used ICU for Unicode regular expressions.
  Unfortunately, ICU doesn't support "Character Class Subtraction";
  hence the following W3C tests fail:


  This bug is more specific than bug 2988205 that will be closed and
  replaced by this bug and a few other more specific bugs.

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