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

<rng:element name="seal">
<rng:ref name="att.global.attributes"/>
<rng:ref name="att.typed.attributes"/>
<rng:ref name="att.datable.w3c.attributes"/>
<rng:ref name="att.datable.iso.attributes"/>
<rng:optional>
 <rng:attribute name="contemporary">
  <rng:ref name="data.xTruthValue"/>
 </rng:attribute>
</rng:optional>
<rng:oneOrMore>
 <rng:choice>
  <rng:ref name="model.pLike"/>
  <rng:ref name="decoNote"/>
 </rng:choice>
</rng:oneOrMore>
</rng:element>

element seal
{
   att.global.attributes,
   att.typed.attributes,
   att.datable.w3c.attributes,
   att.datable.iso.attributes,
   attribute contemporary { data.xTruthValue }?,
   ( model.pLike | decoNote )+
}