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

<rng:element name="oVar">
<rng:ref name="att.global.attributes"/>
<rng:ref name="att.ptrLike.form.attributes"/>
<rng:ref name="att.lexicographic.attributes"/>
<rng:optional>
 <rng:attribute name="type">
  <rng:ref name="data.enumerated"/>
 </rng:attribute>
</rng:optional>
<rng:zeroOrMore>
 <rng:choice>
  <rng:text/>
  <rng:ref name="model.gLike"/>
  <rng:ref name="oRef"/>
 </rng:choice>
</rng:zeroOrMore>
</rng:element>

element oVar
{
   att.global.attributes,
   att.ptrLike.form.attributes,
   att.lexicographic.attributes,
   attribute type { data.enumerated }?,
   ( text | model.gLike | oRef )*
}