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

<rng:element name="correction">
<rng:ref name="att.global.attributes"/>
<rng:ref name="att.declarable.attributes"/>
<rng:optional>
 <rng:attribute name="status" a:defaultValue="unknown">
  <rng:choice>
   <rng:value>high</rng:value>
   <rng:value>medium</rng:value>
   <rng:value>low</rng:value>
   <rng:value>unknown</rng:value>
  </rng:choice>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="method" a:defaultValue="silent">
  <rng:choice>
   <rng:value>silent</rng:value>
   <rng:value>markup</rng:value>
  </rng:choice>
 </rng:attribute>
</rng:optional>
<rng:oneOrMore>
 <rng:ref name="model.pLike"/>
</rng:oneOrMore>
</rng:element>

element correction
{
   att.global.attributes,
   att.declarable.attributes,
   attribute status { "high" | "medium" | "low" | "unknown" }?,
   attribute method { "silent" | "markup" }?,
   model.pLike+
}