UTS #18, Unicode Regular Expressions, Version 15 Released

Version 15 of UTS #18, Unicode Regular Expressions
<http://www.unicode.org/reports/tr18/tr18-15.html>has been released by
the Unicode Consortium. Regular expressions are used throughout much of
the world's software for matching and manipulating text. UTS #18
provides the foundation for the handling of Unicode text in those
expressions.

Version 15 is a major revision. Changes include:

* Conformance clauses dealing with non 1:1 equivalences were either
retracted or modified.
* A Level 2 conformance clause for full properties was added.
* New properties, including Name_Alias matching and Script_Extensions,
were added.
* A recommended compact form of Unicode escapes was added: \u{...}.
* There were many clarifications of the text.

See http://www.unicode.org/reports/tr18/tr18-15.html

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