From: Kofi Weusi-Puryear <puryear@ils.nwu.edu>

Date: Mon, 18 Sep 2000 11:23:14 -0500

Message-Id: <p0433010db5ebec5c7ad2@[129.105.100.55]>

To: www-math@w3.org

Date: Mon, 18 Sep 2000 11:23:14 -0500

Message-Id: <p0433010db5ebec5c7ad2@[129.105.100.55]>

To: www-math@w3.org

What is the best way to write MathML 1.01 content code for multi-step solutions/derivations/proofs? I need to be able to programmatically distinguish between the steps. I also want MathML code that displays well using IBM's TechExplorer. For example let say you want to code the simple multi-step solution: 4*x = x + 6 3*x = 6 x = 2 I could just just have a list of <reln> nodes like this: <math> <reln> <eq/> <apply> <times/> <cn>4</cn> <ci>x</ci> </apply> <apply> <plus/> <ci>x</ci> <cn>6</cn> </apply> </reln> <reln> <eq/> <apply> <times/> <cn>3</cn> <ci>x</ci> </apply> <cn>6</cn> </reln> <reln> <eq/> <ci>x</ci> <cn>2</cn> </reln> </math> But TechExplorer will just scrunch each step together on one line so it ends up looking like: 4*x = x + 63*x = 6x = 2 That way is also problematic in determining which step is what, especially in more complicated examples. I could use <semantics> nodes like this: ... <semantics> <reln> ... </reln> <annotation-xml encoding="MySpecialCode"> <step ID="1"/> </annotation-xml> </semantics> ... Now while I process the MathML code I will definitely know which step is which, but TechExplorer will still scrunch each step together on one line. To solve that problem I could use the <tendsto> operator so TechExplorer's presentation is like this: 4*x = x + 6 -> 3*x = 6 -> x = 2 Still on one line, but less misleading. However since <tendsto> is a binary relational operator, I would have to nest allot of <reln> nodes (each associated with a <tendto> node) inside each other. I could avoid using <tendsto> by using my second option internally, and displaying to users HTML code with MathML embedded in it, each step is displayed on one line. I hoping the MathML community can suggest a simpler solution that only requires the use of MathML 1.01 that TechExplorer would be happy with. Kofi Weusi-Puryear Learning Sciences Ph.D. Student Northwestern University mailto:puryear@ils.northwestern.edu http://www.ils.northwestern.edu/~puryearReceived on Monday, 18 September 2000 12:24:24 UTC

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