They are defined in http://unicode.org/reports/tr35/tr35.html#Unicode_Sets. We should add a pointer to that; could you please file a feedback report for #18 to that effect?
Also, if you find any problems in the description in #35, you can file a ticket at http://unicode.org/cldr/trac/newticket to get them addressed. Mark <https://google.com/+MarkDavis> *— Il meglio è l’inimico del bene —* On Wed, May 28, 2014 at 12:18 AM, Richard Wordingham < richard.wording...@ntlworld.com> wrote: > UTS#18 'Unicode Regular Expressions' Version 17 Requirement RL1.3 > 'Subtraction and Intersection' talks of Unicode sets. What is the > relevant definition of a 'Unicode set'? Is it a finite set of non-empty > strings? Other possibilities that occur to me, depending on context, > include sets of codepoints and sets of indecomposable codepoints. > > Richard. > _______________________________________________ > Unicode mailing list > Unicode@unicode.org > http://unicode.org/mailman/listinfo/unicode >
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