From: Roger L. Costello <costello@mitre.org>

Date: Sun, 13 Jul 2003 09:49:31 -0400

Message-ID: <3F11636B.24B9F554@mitre.org>

To: www-math@w3.org, "Costello,Roger L." <costello@mitre.org>

Date: Sun, 13 Jul 2003 09:49:31 -0400

Message-ID: <3F11636B.24B9F554@mitre.org>

To: www-math@w3.org, "Costello,Roger L." <costello@mitre.org>

Hi Folks, I am just learning MathML, so please bear with me if my questions are naive. I have two questions. 1. Can MathML identifiers be of more that one character? For example, suppose that I wanted to express this formula in MathML: kilometers = miles * 1.62 I can imagine two ways to express this (using content markup). a. Use the full names as identifiers: <math> <apply> <eq/> <ci>kilometers</ci> <apply> <times/> <ci>miles</ci> <cn>1.62</cn> </apply> </apply> </math> b. Use the full names as the value of id attributes: <math> <apply> <eq/> <ci id="kilometers">k</ci> <apply> <times/> <ci id="miles">m</ci> <cn>1.62</cn> </apply> </apply> </math> - Are both of these acceptable? - If so, is one form preferred over another? 2. MathML identifiers (ci) are essentially variables. To evaluate a MathML formula requires that the variables (identifiers) be replaced with actual values. Suppose that there exists a separate XML document which contains the values that you want plugged in for the variables. For example: <River id="Yangtze"> <length units="miles">3914</length> </River> Suppose that I would like to plug in "3914" for "miles" in the above MathML. Is there a recommended practice for linking "3914" to the MathML "miles" identifier? /RogerReceived on Sunday, 13 July 2003 09:51:43 GMT

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