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

<rng:element name="facsimile">
<rng:ref name="att.global.attributes"/>
<rng:group>
 <rng:optional>
  <rng:ref name="front"/>
 </rng:optional>
 <rng:oneOrMore>
  <rng:choice>
   <rng:ref name="model.graphicLike"/>
   <rng:ref name="surface"/>
  </rng:choice>
 </rng:oneOrMore>
 <rng:optional>
  <rng:ref name="back"/>
 </rng:optional>
</rng:group>
</rng:element>

element facsimile
{
   att.global.attributes,
   ( front?, ( model.graphicLike | surface )+, back? )
}