From: David Carlisle <davidc@nag.co.uk>

Date: Wed, 14 Mar 2001 18:19:45 GMT

Message-Id: <200103141819.SAA14945@penguin.nag.co.uk>

To: tobias.burnus@physik.fu-berlin.de

CC: www-math@w3.org, www-math@w3.org, pragma@wxs.nl

Date: Wed, 14 Mar 2001 18:19:45 GMT

Message-Id: <200103141819.SAA14945@penguin.nag.co.uk>

To: tobias.burnus@physik.fu-berlin.de

CC: www-math@w3.org, www-math@w3.org, pragma@wxs.nl

> a) It is not clear what the difference between "float" and "real. > (I cannot find "float" anymore, maybe the PDF file is/was older I think there is none. It may be that an errata clarification is needed: the description of cn: http://www.w3.org/TR/MathML2/chapter4.html#contm_cn does not list float amongst the allowed types (just real). but the general description of the type attrib: http://www.w3.org/TR/MathML2/chapter4.html#contm_typeattrib does include float. I'll raise this with the working group.... > Also the difference between "complex" and "complex-cartesian" is not > clear. (I guess there is none.) the description of this changed slightly in one of the later drafts. Basically complex-cartesian/complex-polar should only be allowed on cn where they are needed to understand the <sep/> construct. Earlier drafts allowed these also on <ci> but it makes no sense there, a complex identifier is a logical element of the complex numbers it is neither cartesian nor polar, so on ci the final draft just allows complex. > b) Are there any guidelines which <semantic/> presentations should be > favoured and if it is allowed to have both xml-annotations MathML-Content > and/or MathML-Presentation (the examples use only the latter). You can have both (you can annotate a content expression with presentation or visa versa). The default presentation of a semantic element is the presentation of its base (the annotations are just annotations) although when I did that in xmltex, I rendered the thing as the presentation-mathml annotation, if such an annotation was given. > c) Do you know a list of the different presentations of mathematical > operators (such as "n over k" which I cannot find in the HTML version). I think the answer is no, but I'm not sure I understand the question, could you expand it slightly? David _____________________________________________________________________ This message has been checked for all known viruses by Star Internet delivered through the MessageLabs Virus Control Centre. For further information visit http://www.star.net.uk/stats.aspReceived on Wednesday, 14 March 2001 13:24:49 GMT

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