MusicXML 4.1 Draft
MusicXML 4.1 Draft > MusicXML Reference > Examples > <accordion-registration>

<accordion-registration>

accordion-registration-element

<direction>
   <direction-type>
      <accordion-registration>
         <accordion-high/>
         <accordion-middle>3</accordion-middle>
      </accordion-registration>
   </direction-type>
</direction>