<dataSpec xmlns="http://www.tei-c.org/ns/1.0" rend="add" ident="data.DIGITORUNKNOWN" module="MEI">
<desc xml:lang="en">A digit (0-9) or 'unknown'.</desc>
<content>
<alternate minOccurs="1" maxOccurs="1"><dataRef name="nonNegativeInteger">
<dataFacet name="maxInclusive" value="9"/>
</dataRef>
<dataRef name="token">
<dataFacet name="pattern" value="unknown"/>
</dataRef></alternate>
</content>
</dataSpec>