[jats-list] Losing support for MathML <mlabeledtr>

["Michael Boudreau mboudreau@xxxxxxxxxxxx" <jats-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi all,

I have a JATS-adjacent question about tagging numbered equations.

The MathType plugin for Arbortext Editor, the XML-based editing software we
use, appears to be dropping support for the <mlabeledtr> element, which we use
for numbered equations like this:

<disp-formula id="df1">
<math xmlns="http://www.w3.org/1998/Math/MathML";>
  <mrow>
    <mtable>
      <mlabeledtr>
        <mtd>
          <mtext>(1)</mtext>
        </mtd>
        <mtd>
          <mi>E</mi>
          <mo>=</mo>
          <mi>m</mi>
          <msup>
            <mi>c</mi>
            <mn>2</mn>
          </msup>
        </mtd>
      </mlabeledtr>
    </mtable>
  </mrow>
</math>
</disp-formula>

MathJax renders the equation like so, placing the label flush to the right
margin, as in traditional math typesetting:

[Eqn with mlabeledtr.png]

In addition, it appears that <mlabeledtr> is being phased out of the next
version of MathML. If we can't support the markup above, we'll likely have to
use an alternative like this:

<disp-formula id="df1">
    <label>(1)</label>
    <math xmlns="http://www.w3.org/1998/Math/MathML";>
        <mi>E</mi>
        <mo>=</mo>
        <mi>m</mi>
        <msup>
            <mi>c</mi>
            <mn>2</mn>
        </msup>
    </math>
</disp-formula>

The drawback to this is that most editors and browsers by default render the
label to the left of (or above) the equation, rather than flush to the right
margin. Whether our platform can position the label properly with CSS without
interfering with MathJax, which renders the MathML, is yet unknown.

Is there a better alternative to tagging numbered equations without using
<mlabeledtr>?

--
Michael R. Boudreau
Electronic Publishing Technology Manager
The University of Chicago Press
1427 E. 60th Street
Chicago, IL 60637
www.journals.uchicago.edu

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