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Re: Question ?

From: David Carlisle <davidc@nag.co.uk>
Date: Thu, 17 Jul 2003 12:32:26 +0100
Message-Id: <200307171132.MAA02934@penguin.nag.co.uk>
To: suri_rahul1@rediffmail.com
CC: www-math@w3.org


   Please clarify the difference between Presentation Mathml and 
    Content Mathml.


Your question was not very specific, you didn't make clear which part of
the existing text describing the difference you found uncluear.

There are examples in "MathML Fundamentals" 
http://www.w3.org/TR/MathML2/chapter2.html
that are given in both presentation and content form.



Presentation mathml encodes the presentation layout
so <msup><mi>H</mi><mn>2</mn></msup> is the same as TeX H^2
and means H with superscript 2, whatever that means, it might mean
H times H or the 2nd Cohomolgy group or anything else depending on
context.

The content MathML 
<apply><power/><ci>H</ci><cn>2</cn></apply>

means the power function applied to H and 2 so it definitely means H
times H, it probably is rendered as H^2, but unlike the presentation
form it is more or less unambiguous about its meaning. (The meaning of
power itself might change depending on what group you are working over)

David

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Received on Thursday, 17 July 2003 07:32:45 GMT

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