On 25/11/2004 01:27, Asmus Freytag wrote:
...
Also the following clarification is being proposed for UAX #16 on line breaking (public review issue #56):
UTR#16 is UTF-EBCDIC, you must mean UAX#14.
Indeed. Sorry.
... But this draft also states:
when NBSP follows SPACE, there is a break opportunity after the SPACE and NBSP will go as visible space onto the next line.
This is different from what Asmus stated above: "The sequence SPACE NBSP *does* not allow a break
my editing mistake in composing my message to you. If you check the first sentence of http://www.unicode.org/report/tr14-16.html#GL you will see why it's *does* allow the break.
404 error. I think you mean http://www.unicode.org/reports/tr14/tr14-16.html#GL.
But this sentence is the proposed amendment. I was wondering if this is a material change to the algorithm, or just a clarification. And I thought maybe you were describing the current situation and ignoring the proposed change. So I looked back at the edition of UAX #14 which is still current, http://www.unicode.org/reports/tr14/. It seems that part of the proposed change is to move the rule "Don’t break before or after NBSP", currently part of LB11b, to after rule LB12 "Break after spaces", making a proposed new rule LB13 - in accordance with the note "Many existing implementations reverse the order of precedence between rules LB11b and LB12." The change of ordering of course implies a change of priority of the rules.
So, Asmus, it seems to me that you were right the first time. According to the current standard, there is no line breaking opportunity in the middle of <SPACE, NBSP>. But there is a proposed change to make this a line breaking opportunity. Is that correct? Perhaps this part of the change to UAX #14 has already been approved in principle by the UTC (as no doubt there was a discussion of issues related to NBSP as part of the discussion of the INVISIBLE LETTER proposal), but formally it is still part of the public review issue.
-- Peter Kirk [EMAIL PROTECTED] (personal) [EMAIL PROTECTED] (work) http://www.qaya.org/
