The @label attribute can be used to differentiate between multiple MIDI data streams, e.g., quantized/unquantized, straight/swing, ornamented/as notated, etc.
<elementSpec xmlns="http://www.tei-c.org/ns/1.0" rend="add" ident="midi" module="MEI.midi"><desc xml:lang="en">Container for elements that contain information useful when generating MIDI output.</desc>
<classes>
<memberOf key="att.common"/>
<memberOf key="att.midi.log"/>
<memberOf key="att.midi.ges"/>
<memberOf key="att.midi.anl"/>
<memberOf key="model.midiLike"/>
</classes>
<content>
<alternate minOccurs="0" maxOccurs="unbounded"><elementRef key="cc"/>
<elementRef key="chan"/>
<elementRef key="chanPr"/>
<elementRef key="cue"/>
<elementRef key="hex"/>
<elementRef key="marker"/>
<elementRef key="metaText"/>
<elementRef key="noteOff"/>
<elementRef key="noteOn"/>
<elementRef key="port"/>
<elementRef key="prog"/>
<elementRef key="seqNum"/>
<elementRef key="trkName"/>
<elementRef key="vel"/></alternate>
</content>
<remarks xml:lang="en">
<p>The <att>label</att> attribute can be used to differentiate between multiple MIDI data
streams,
<abbr>e.g.</abbr>, quantized/unquantized, straight/swing, ornamented/as notated, etc.</p>
</remarks></elementSpec>