From: Peter Murray-Rust <pm286@cam.ac.uk>

Date: Mon, 19 Mar 2012 08:31:52 +0000

Message-ID: <CAD2k14MbDRFW-ubJ_qmeFJUbpiSFF2e1yD8kXC+1-3CW7NtFSQ@mail.gmail.com>

To: Roger Martin <mathmldashx@yahoo.com>

Cc: "www-math@w3.org" <www-math@w3.org>, Andrew Walker <Andrew.Walker@bristol.ac.uk>, Martin Dove <mtd10@cam.ac.uk>, Jens Thomas <jensthomas2@gmail.com>, Mark Williamson <mw529@cam.ac.uk>, Charlotte Bolton <charlotte.bolton@gmail.com>

Date: Mon, 19 Mar 2012 08:31:52 +0000

Message-ID: <CAD2k14MbDRFW-ubJ_qmeFJUbpiSFF2e1yD8kXC+1-3CW7NtFSQ@mail.gmail.com>

To: Roger Martin <mathmldashx@yahoo.com>

Cc: "www-math@w3.org" <www-math@w3.org>, Andrew Walker <Andrew.Walker@bristol.ac.uk>, Martin Dove <mtd10@cam.ac.uk>, Jens Thomas <jensthomas2@gmail.com>, Mark Williamson <mw529@cam.ac.uk>, Charlotte Bolton <charlotte.bolton@gmail.com>

I have now made progress on my MathCML engine (combined mathematics and chemistry). I have been much encouraged by this list and hope I may continue to ask questions - any progress I make is updated at https://www.bitbucket.org/petermr/mathml. One of my uses is to chain simple statements sequentially as in a computer program, such as x=1 y=2 r=x+y x=9 and turn it into: <math> // I shall omit namespaces for brevity <apply><eq/><ci>x</ci><cn>1</cn></apply> <apply><eq/><ci>y</ci><cn>2</cn></apply> <apply><eq/><ci>r</ci><apply><plus/><ci>x</ci><ci>y</ci></apply></apply> <apply><eq/><ci>x</ci><cn>9</cn></apply> </math> Can I check that this is (a) valid MathML and (b) stylistically/semantically acceptable MathML? My understanding of the discussion so far is that the "x" in line 1 may or may not be the "same as" the "x" in line 3; that MathML is silent on this. If so it is legitimate for me to assume it is. It is also legitimate for me to assume it carries the value 1 to line 3 and that "r" could be evaluated as 3. (It is aso legitimate for others to assert that they don't accept these semantics). There is also no universal agreed terminology that I can use to enforce my interpretation. That I have to use a content dictionary (cd) to make that assertion and that (probably) I have to do this in human language If this is agreed then I shall continue on this basis. What are the potential dangers other than other MATHML users misunderstanding what I am doing? More generally my engine will wish to manage objects other than pure maths objects (e.g. molecules). Can I assume that as long as I simply expose the symbols and not the detailed structure MathML will not care. For example: <apply <http://zvon.org/xxl/MathML/Output/el_apply.html>> <sum <http://zvon.org/xxl/MathML/Output/el_sum.html>/> <bvar <http://zvon.org/xxl/MathML/Output/el_bvar.html>> <ci <http://zvon.org/xxl/MathML/Output/el_ci.html>> bond </ci<http://zvon.org/xxl/MathML/Output/el_ci.html>> </bvar <http://zvon.org/xxl/MathML/Output/el_bvar.html>> <condition <http://zvon.org/xxl/MathML/Output/el_condition.html>> <apply <http://zvon.org/xxl/MathML/Output/el_apply.html>> <in <http://zvon.org/xxl/MathML/Output/el_in.html>/> <ci <http://zvon.org/xxl/MathML/Output/el_ci.html>> bond </ci<http://zvon.org/xxl/MathML/Output/el_ci.html>> <ci <http://zvon.org/xxl/MathML/Output/el_ci.html>type="set"> bondSet </ ci <http://zvon.org/xxl/MathML/Output/el_ci.html>> </apply <http://zvon.org/xxl/MathML/Output/el_apply.html>> </condition <http://zvon.org/xxl/MathML/Output/el_condition.html>> <apply <http://zvon.org/xxl/MathML/Output/el_apply.html>> <ci <http://zvon.org/xxl/MathML/Output/el_ci.html> type="fn"> bondLength </ci <http://zvon.org/xxl/MathML/Output/el_ci.html>> <ci <http://zvon.org/xxl/MathML/Output/el_ci.html>> bond </ci<http://zvon.org/xxl/MathML/Output/el_ci.html>> </apply <http://zvon.org/xxl/MathML/Output/el_apply.html>> </apply <http://zvon.org/xxl/MathML/Output/el_apply.html>> will apply the function "bondLength" to a set "bondSet" (which happens to be a set of bonds) If so, are they stylistic and semantic conventions I should be aware of? -- Peter Murray-Rust Reader in Molecular Informatics Unilever Centre, Dep. Of Chemistry University of Cambridge CB2 1EW, UK +44-1223-763069Received on Monday, 19 March 2012 08:32:34 GMT

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