P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="physDesc">
 <rng:ref name="att.global.attributes"/>
 <rng:choice>
  <rng:oneOrMore>
   <rng:ref name="model.pLike"/>
  </rng:oneOrMore>
  <rng:group>
   <rng:ref name="model.physDescPart_sequenceOptional"/>
  </rng:group>
 </rng:choice>
</rng:element>

element physDesc
{
   att.global.attributes,
   ( model.pLike+ | ( model.physDescPart_sequenceOptional ) )
}