1.1 Subscrips and Superscripts (sub and super)

<..configure jsml-math tex4ht..>+
 <.sub, sup, subsup.>
 <.limits sub, sup, subsup.>
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<..sub, sup, subsup..>
 \Configure{SUB}
    {\Send{BACK}
      {<.start msub base.>}<.msub sub.>}
    {<.close msub.>}
 \Configure{SUP}
    {\Send{BACK}
    {<.start msup base.>}<.msup super.>}
    {<.close msup.>}
 \Configure{SUBSUP}
    {\Send{BACK}
    {<.start msubsup base.>}<.msubsup sub.>}
    {<.msubsup sup.>}
    {<.close msubsup.>}
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<..start msup base..>
 <msup><mrow class="mrow-base"\Hnewline>%
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<..msup super..>
 \HCode{</mrow><mrow class="mrow-super"\Hnewline
     >\add:description{begin-script}{\b:speak:subsup}%
        <PROS PITCH="+10">}\trap:base
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<..close msup..>
 \HCode{</PROS>\add:description{end-script}{\c:speak:subsup}%
        </mrow></msup\Hnewline>}%
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<..start msub base..>
 <msub><mrow class="mrow-base"\Hnewline>%
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<..msub sub..>
 \HCode{</mrow><mrow class="mrow-sub"\Hnewline
    >\add:description{begin-script}{\a:speak:subsup}%
    <PROS PITCH="-10">}\trap:base
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<..close msub..>
 \HCode{</PROS>\add:description{end-script}{\c:speak:subsup}%
    </mrow></msub\Hnewline>}%
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<..start msubsup base..>
 <msubsup><mrow class="mrow-base"\Hnewline>%
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<..msubsup sub..>
 \HCode{</mrow><mrow class="mrow-sub"\Hnewline
    >\add:description{begin-script}{\a:speak:subsup}%
         <PROS PITCH="-10">}\trap:base
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<..msubsup sup..>
 \HCode{</PROS></mrow><mrow class="mrow-super"\Hnewline
    >\add:description{mid-script}{\b:speak:subsup}%
         <PROS PITCH="+10">}\trap:base
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<..close msubsup..>
 \HCode{</PROS>\add:description{end-script}{\c:speak:subsup}%
    </mrow></msubsup\Hnewline>}%
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<..configure jsml-math tex4ht..>+
 \NewConfigure{speak:subsup}{3}
 \Configure{speak:subsup}
    {<PROS PITCH="-5"><BREAK SIZE="small"/>
     <span class="scripts-extra"> subscript </span>
     <BREAK SIZE="small"/></PROS>}
    {<PROS PITCH="+5"><BREAK SIZE="small"/>
     <span class="scripts-extra"> superscript </span>
     <BREAK SIZE="small"/></PROS>}
    {<PROS PITCH="-5"><BREAK SIZE="medium"/>
     <span class="scripts-extra"> baseline </span>
     <BREAK SIZE="small"/></PROS>}
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