P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="msPart">
 <rng:ref name="att.global.attributes"/>
 <rng:group>
  <rng:ref name="altIdentifier"/>
  <rng:zeroOrMore>
   <rng:ref name="model.headLike"/>
  </rng:zeroOrMore>
  <rng:choice>
   <rng:oneOrMore>
    <rng:ref name="model.pLike"/>
   </rng:oneOrMore>
   <rng:group>
    <rng:optional>
     <rng:ref name="msContents"/>
    </rng:optional>
    <rng:optional>
     <rng:ref name="physDesc"/>
    </rng:optional>
    <rng:optional>
     <rng:ref name="history"/>
    </rng:optional>
    <rng:optional>
     <rng:ref name="additional"/>
    </rng:optional>
    <rng:zeroOrMore>
     <rng:ref name="msPart"/>
    </rng:zeroOrMore>
   </rng:group>
  </rng:choice>
 </rng:group>
</rng:element>

element msPart
{
   att.global.attributes,
   (
      altIdentifier,
      model.headLike*,
      (
         model.pLike+
       | ( msContents?, physDesc?, history?, additional?, msPart* )
      )
   )
}