P5: Principes directeurs pour l'encodage et l'échange de textes électroniques

<rng:element name="msIdentifier">
 <rng:ref name="att.global.attributes"/>
 <rng:group>
  <rng:group>
   <rng:ref name="model.placeNamePart_sequenceOptional"/>
   <rng:optional>
    <rng:ref name="institution"/>
   </rng:optional>
   <rng:optional>
    <rng:ref name="repository"/>
   </rng:optional>
   <rng:zeroOrMore>
    <rng:ref name="collection"/>
   </rng:zeroOrMore>
   <rng:optional>
    <rng:ref name="idno"/>
   </rng:optional>
  </rng:group>
  <rng:zeroOrMore>
   <rng:choice>
    <rng:ref name="msName"/>
    <rng:ref name="altIdentifier"/>
   </rng:choice>
  </rng:zeroOrMore>
 </rng:group>
</rng:element>

element msIdentifier
{
   att.global.attributes,
   (
      (
         model.placeNamePart_sequenceOptional,
         institution?,
         repository?,
         collection*,
         idno?
      ),
      ( msName | altIdentifier )*
   )
}