From: Ian Hickson <ian@hixie.ch>

Date: Thu, 3 Apr 2008 21:20:55 +0000 (UTC)

To: Sam Ruby <rubys@us.ibm.com>

Cc: Jeff Schiller <codedread@gmail.com>, Henri Sivonen <hsivonen@iki.fi>, HTML WG <public-html@w3.org>, Public MathML mailing list <www-math@w3.org>

Message-ID: <Pine.LNX.4.62.0804032114540.18949@hixie.dreamhostps.com>

Date: Thu, 3 Apr 2008 21:20:55 +0000 (UTC)

To: Sam Ruby <rubys@us.ibm.com>

Cc: Jeff Schiller <codedread@gmail.com>, Henri Sivonen <hsivonen@iki.fi>, HTML WG <public-html@w3.org>, Public MathML mailing list <www-math@w3.org>

Message-ID: <Pine.LNX.4.62.0804032114540.18949@hixie.dreamhostps.com>

On Thu, 3 Apr 2008, Sam Ruby wrote: > > > > I haven't taken a sample of text/html pages that contain such triggers > > yet, but I _have_ done such a sample for MathML, and it showed that > > for that vocabulary we would need some sort of hardcoded list to > > handle the existing content. (Either a whitelist of MathML elements or > > a blacklist of HTML elements, but either way we've lost the genericity > > of the problem you are trying to solve.) > > I disagree that for MathML that you have shown that we would need some > sort of hardcoded list. The most that you have demonstrated is that a > hardcoded list would suffice for a snapshot of the MathML vocabulary > taken at this point in time. As I said, either a whitelist of MathML elements, or a blacklist of HTML ones (based on Henri and Simon's ideas). The blacklist looks like the more workable solution at the moment, at least in terms of the forward- compatibility story (though it certainly would be much easier to come up with an exhaustive whitelist). > I am confident that such a hard coded list would not work for SVG, not > even for a snapshot of the vocabulary. I am hopeful that whatever > approach you chose to accept for SVG will also apply to MathML, and will > not further constrain the development of that vocabulary. Finding a way to support a graphics vocabulary and a math vocabulary has been on the list of problems I'm trying to solve since the beginning of the list; my understanding was that you wanted a solution that wasn't limited to just two vocabularies. I agree that the former is possible in some way, it's the latter that I can't see how to solve. I now have some rough notes of what I think we can do to the parser to handle SVG and MathML here: http://wiki.whatwg.org/wiki/New_Vocabularies_Solution (This is the level of detail I've been asking for these past few years, by the way.) -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'Received on Thursday, 3 April 2008 21:22:02 UTC

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