Re: SVG12: IRI Processing rules and xlink:href

On Monday, June 13, 2005, 9:56:00 PM, Bjoern wrote:

BH> * Chris Lilley wrote:
>>BH> Yes. And the algorithm defined in RFC 3987 produces different
>>BH> results than those defined in XML 1.0, XML Schema 1.0, SVG 1.1, HTML
>>BH> 4.01, XML Catalogs, XInclude, XPointer, etc. which produce
>>BH> equivalent results.
>>Because international DNS was not included in the copy paste versions.

BH> Well, the difference I am referring to is the incompatibility
BH> with the reference character processing model

Ah! Thanks for being more specific; the part that I thought you were
alluding to and what in fact concerns you turns out to be quite

BH> as discussed in


BH> This difference was part of the drafts since draft-masinter-
BH> url-i18n-02 (published 1998) though the cases in which it
BH> applies as well as the requirement levels changed over time.

Okay. I see from the link you provided that you have been discussing
this on a thread crossposted to and - looking at the June archives the thread seems
to have died.  Accordingly I have copied on this
reply, to get further guidance.

Okay, so it comes down to character normalization when non-Unicode
encodings are used and the character data has not been normalized.

I can see that this is potentially an issue in CSS, but for XML where the
only two encodings guaranteed to work across XML parsers are UTF-8 and
UTF-16, and where use of any other (non codepoint subset - declaring
UTF-8 and then using US-ASCII is not relevant here) encoding has
always required declaration of the encoding, this seems to be less of a

If I misunderstand, perhaps you could provide a well-formed SVG example
derived from one of your CSS examples that illustrates the problem?

BH> The other differences are quite unimportant, especially since
BH> RFC 3986 takes some of these into account.

Yes it does, but thanks again for the clarification.

 Chris Lilley          
 Chair, W3C SVG Working Group
 W3C Graphics Activity Lead

Received on Wednesday, 15 June 2005 22:13:08 UTC