MusicXML 4.1 Draft
MusicXML 4.1 Draft > MusicXML Reference > Examples > <group-abbreviation>

<group-abbreviation>

group-abbreviation-element

<part-group number="3" type="start">
   <group-name>Horn in F</group-name>
   <group-abbreviation>Hn.</group-abbreviation>
   <group-symbol default-x="-10">square</group-symbol>
   <group-barline>yes</group-barline>
</part-group>