P5: Linee guida per la codifica e l'interscambio del testo elettronico

<rng:element name="unclear">
<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:optional>
 <rng:attribute name="hand">
  <rng:ref name="data.pointer"/>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="agent">
  <rng:ref name="data.enumerated"/>
 </rng:attribute>
</rng:optional>
<rng:ref name="macro.paraContent"/>
</rng:element>

element unclear
{
   att.global.attributes,
   att.editLike.attributes,
   attribute reason { list { data.word+ } }?,
   attribute hand { data.pointer }?,
   attribute agent { data.enumerated }?,
   macro.paraContent
}