From: Neil Soiffer <soiffer@DesSci.com>

Date: Mon, 5 May 2003 12:57:19 -0700 (PDT)

Message-Id: <200305051957.MAA01270@drizzle.wolfram.com>

To: Bernhard.Keil@soft4science.com (Bernhard Keil)

Cc: RobertM@DesSci.com (Robert Miner), www-math@w3.org

Date: Mon, 5 May 2003 12:57:19 -0700 (PDT)

Message-Id: <200305051957.MAA01270@drizzle.wolfram.com>

To: Bernhard.Keil@soft4science.com (Bernhard Keil)

Cc: RobertM@DesSci.com (Robert Miner), www-math@w3.org

> Like Robert has stated, it is not possible to convert presentation markup to content markup in general. > In simple cases a heuristic approach can lead to the right result, but this > is far away from a general solution that can be used without human interaction. > > > A presentation markup like this: > > <math xmlns="http://www.w3.org/1998/Math/MathML"> > <msup> > <msub> > <mi>σ</mi> > <mi>x</mi> > </msub> > <mn>2</mn> > </msup> > </math> > > can only be converted to the following content markup: > > <math display="block" xmlns="http://www.w3.org/1998/Math/MathML"> > <moapply> > <variance/> > <ci> X </ci> > </apply> > </math> > > by phoning the author and asking him whether this is what he has mentioned. While I agree that this is needed for 100% certainty, you wouldn't do that if you were reading a paper containing it. If the software doing the conversion has information about the context (eg, by user control or metadata extraction), it can make these transformation with very high reliablility. There is an important point about notation: it is meant to imply underlying functionality. If it is ambigious within its context, it is probably confusing to readers and will eventually die a timely death. Neil Soiffer email: neils@dessci.com Senior Scientist phone: 562-433-0685 Design Science, Inc. http://www.dessci.com "How Science Communicates"Received on Monday, 5 May 2003 15:57:18 UTC

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