P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="listNym">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.typed.attributes"/>
 <rng:ref name="att.declarable.attributes"/>
 <rng:group>
  <rng:zeroOrMore>
   <rng:ref name="model.headLike"/>
  </rng:zeroOrMore>
  <rng:oneOrMore>
   <rng:choice>
    <rng:ref name="nym"/>
    <rng:ref name="listNym"/>
   </rng:choice>
  </rng:oneOrMore>
  <rng:zeroOrMore>
   <rng:choice>
    <rng:ref name="relationGrp"/>
    <rng:ref name="relation"/>
   </rng:choice>
  </rng:zeroOrMore>
 </rng:group>
</rng:element>

element listNym
{
   att.global.attributes,
   att.typed.attributes,
   att.declarable.attributes,
   ( model.headLike*, ( nym | listNym )+, ( relationGrp | relation )* )
}