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Re: sparse matrix support in MathML

From: David Carlisle <davidc@nag.co.uk>
Date: Thu, 31 May 2007 14:55:36 +0100
Message-Id: <200705311355.l4VDtaur004932@edinburgh.nag.co.uk>
To: R.W.Kaye@bham.ac.uk
Cc: www-math@w3.org


> This representation of a sparse matrix can already be given in content
> MathML I think. 

Which leads back to the initial point that more or less anything can be
represented using csymbol, the trouble is that in general no application
knows what it represents.

We hope to addresss that better in MathML3 by more strongly stressing
(and distubiting, and encouraging others to distribute) some form of
"content dictionary" that specifies the mathematics behind any given
csymbol. There are some pointers to that in the current chapter 4 draft
but it's not fleshed out yet (because it's not designed yet, ideas
welcome...) there is also room if it is thought necessary to add custom
syntax with more closely specified semantics and default rendering, if
it can be clearly seen what is a good "cut off" point between full
generality and "easily specified default behaviour" and "not making the
core set of mathml eleemnts and attributes too big".


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