<br><br><div><span class="gmail_quote">On 12/20/06, <b class="gmail_sendername">Harald Alvestrand</b> <<a href="mailto:harald@alvestrand.no">harald@alvestrand.no</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Kenneth Whistler wrote:<br>> On<br>><br>><br>>> Date: Sat, 16 Dec 2006 11:58:43 +0100<br>>><br>Ken,<br><br>at a more 10.000 foot level:<br>are you of the opinion that an IDNA restriction rule, in order to be
<br>viable, needs to include:<br><br>- A (short) table of rules based on existing Unicode properties<br>(including "script")<br>- An exclusion table, excluding charcters that are included by the rules<br>- An inclusion table, including characters that are excluded by the rules
<br>- A set of context dependent rules, saying that certain characters can<br>only be used in certain combinations?<br></blockquote><div>
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Yes, that's a good restatement.<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I think this may be a correct conclusion to draw from the discussion so
<br>far, but does mean that we have admitted that we need to examine the<br>codeset character by character, at some level.</blockquote><div><br>
Ken has been making suggestions for reductions which are really also
based on classes of characters, just ones that are not formalized as
Unicode properties. Frankly, few of them would cause spoofing problems,
and I wouldn't bother with them at all except that insofar as they are
clearly not used by modern languages, they are safe to exclude. Once such cases are eliminated, then I don't think it is productive to continue on that line, since other techniques, such as mixed-script detection, are far more powerful.
<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Harald<br><br><br><br><br>_______________________________________________<br>Idna-update mailing list
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