P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="supplied">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.editLike.attributes"/>
 <rng:optional>
  <rng:attribute name="reason">
   <rng:list>
    <rng:oneOrMore>
     <rng:ref name="data.word"/>
    </rng:oneOrMore>
   </rng:list>
  </rng:attribute>
 </rng:optional>
 <rng:ref name="macro.paraContent"/>
</rng:element>

element supplied
{
   att.global.attributes,
   att.editLike.attributes,
   attribute reason { list { data.word+ } }?,
   macro.paraContent
}