<dataSpec xmlns="http://www.tei-c.org/ns/1.0" rend="add" ident="data.FRETNUMBER" module="MEI">
<desc xml:lang="en">In string tablature, the fret number. The value
<val>0</val> (zero) indicates the open
string.</desc>
<content>
<dataRef name="nonNegativeInteger"/>
</content>
</dataSpec>