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(consensus of i18n-core-wg, telecon 25 may 2005): In sec. 7.6.1 (on Regular Expression Syntax) you should refer to the Unicode Technical Standard #18 "Unicode Regular Expressions", which describes guidelines for how to adapt regular expression engines to use Unicode.
Are you suggesting that a normative reference is needed, i.e. that our specifications don't completely define regular expression semantics without such a cross-reference? Or are you suggesting that we should provide such a reference as a kind of historical note explaining how we arrived at our specification? Michael Kay (personal response)
I took a look at UTS 18. Its purpose is to teach users how to use Regex's with collations and warn them of possible difficulties and gotchas. I agree that such information may be useful to users of XQuery but I'm not sure we need to do anything about this. So, my first reaction is -- do nothing. The Unicode Consortium has published this useful document and that's great! Thank you! If that's not acceptable, then I would suggest we add a Usage Note to the F&O that says "BTW, there are special considerations in using Regex's with collations. Please take a look at UTS18 if you are planning to do that." Ashok Malhotra (personal response)
It was decided on the joint WG telcon on June 7, 2005 to close this comment by adding a note to the F&O section 7.6.1 that says "It is recommended that implementers consult [Unicode Regular Expressions] for information on using regular expression processing on Unicode characters."
consenus of the i18n-core-wg (telecon 21 May 2005): The working group agrees to your changes. We thank you very much and regard the bug as closed. Regards, Felix Sasaki