From: Robert Miner <RobertM@dessci.com>

Date: Tue, 2 Jul 2002 15:07:12 -0500

Message-Id: <200207022007.PAA32102@wisdom.geomtech.com>

To: seul@zino.physik.uni-mainz.de

CC: www-math@w3.org, www-math@w3.org, seul@zino.physik.uni-mainz.de

Date: Tue, 2 Jul 2002 15:07:12 -0500

Message-Id: <200207022007.PAA32102@wisdom.geomtech.com>

To: seul@zino.physik.uni-mainz.de

CC: www-math@w3.org, www-math@w3.org, seul@zino.physik.uni-mainz.de

Hi. > here in the Thep-Group in the physics department of the university of > Mainz we intend to use MathML-Content Markup for formulation of > model-files in high energy physics. Are there plans for the next version > of MathML to include kovariant and kontravariant indices in the content > markup? If yes, how would it look like? No, there aren't any plans to release a new version of MathML soon, apart from errata and bug fixes. Instead, I would look at using the existing extension mechanisms. What many people are doing is <csymbol definitionURL="..."> to define new operators, and then transforming them to presentation markup using XSL for display. For example, one might introduce a csymbol for a Chrisoffel symbol which would be used like this: <apply> <cymbol definitionURL="http://physik.uni-mainz.de/definitions/functors">Γ</csymbol> <ci>i</ci> <ci>j</ci> <ci>k</ci> </apply> Then, one would create an XSL, say functor.xsl, that would transform this to <mmultiscripts> <mi>&Gamma</mi> <mi>j</mi> <mi>k</mi> <mi>i</mi> </none> </mmultiscripts> (provided I got the order of the covariant and contravariant indicies correct, which is very doubtful. :-) Many other groups are are working on content markup extensions in this fashion. One place to check to see if someone has already done the work for you is www.openmath.org. Also, if you do carry out this work, I would encourage you to publish your definitions and your stylesheet to this list, so that others can use your work instead of reinventing the wheel. --Robert ------------------------------------------------------------------ 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 Tuesday, 2 July 2002 16:07:52 GMT

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