From: Robert Miner <RobertM@dessci.com>

Date: Fri, 6 Dec 2002 10:23:15 -0600

Message-Id: <200212061623.KAA18623@wisdom.geomtech.com>

To: greenrd@hotmail.com

CC: www-math@w3.org, www-math@w3.org

Date: Fri, 6 Dec 2002 10:23:15 -0600

Message-Id: <200212061623.KAA18623@wisdom.geomtech.com>

To: greenrd@hotmail.com

CC: www-math@w3.org, www-math@w3.org

Hi. > I am using an operator in my MathML content markup which doesn't have a > dedicated MathML element (Unicode character 22A2, RIGHT_TACK). I am using > the W3C content->presentation stylesheet and Mozilla 1.2 to render it. > However, it is rendering it as > > T(a,b) > > instead of > > a T b > > (where T is the operator). > > Now the only portable solution I can see to this in MathML 2.0 is to use > parallel presentation markup. But I think this is overcomplicated, > especially if I have a heavily nested expression with RIGHT_TACK on the > outside. I think it also fundamentally broken, because it means that I would > use some stylesheet (say a modified version of the w3c stylesheet mentioned > above) to generate the parallel presentation markup for such complicated > cases - but this rendering might not precisely match the rendering given by > every user agent which can directly read MathML content markup. So parallel > content/presentation markup is in principle liable to lead to > inconsistent/uneven rendering for the same document - unless you convert it > all to presentation markup first, but then you lose the benefits of pure > content markup! I guess I don't follow this. If you use parallel markup, even a user agent that *could* read the content markup will use the presentation markup anyway. I think you only run the risk of different user agents rendering it differently if you send some of them the straight content markup, and others the parallel markup. > Isn't there, or shouldn't there be, some sort of "CSS equivalent" for > MathML, whereby I can say "RIGHT_TICK should be rendered as an infix > operator"? That might work is browsers where there is a CSS environment available to the MathML (read "only Netscape/Mozilla"), but it leaves out most other MathML software. So my inclination would be to stick with an XSL-based solution. But I agree with you in principle. My initial reaction would be to do something like <csymbol class="infix-operator">&22A2;</csymbol> and add an XSL template for this case. Basically it would be a modification of any of the templates for infix operators, but instead of looking for a particular element in the first slot of an apply, it would look for any element with this class attribute in the first slot of an apply. --Robert ------------------------------------------------------------------ Dr. Robert Miner RobertM@dessci.com MathML 2.0 Specification Co-editor 651-223-2883 Design Science, Inc. "How Science Communicates" www.dessci.com ------------------------------------------------------------------Received on Friday, 6 December 2002 11:23:48 UTC

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