P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="trait">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.datable.w3c.attributes"/>
 <rng:ref name="att.datable.iso.attributes"/>
 <rng:ref name="att.editLike.attributes"/>
 <rng:ref name="att.naming.attributes"/>
 <rng:ref name="att.typed.attributes"/>
 <rng:choice>
  <rng:oneOrMore>
   <rng:ref name="trait"/>
  </rng:oneOrMore>
  <rng:group>
   <rng:zeroOrMore>
    <rng:ref name="model.headLike"/>
   </rng:zeroOrMore>
   <rng:oneOrMore>
    <rng:ref name="model.pLike"/>
   </rng:oneOrMore>
   <rng:zeroOrMore>
    <rng:choice>
     <rng:ref name="model.noteLike"/>
     <rng:ref name="model.biblLike"/>
    </rng:choice>
   </rng:zeroOrMore>
  </rng:group>
  <rng:group>
   <rng:zeroOrMore>
    <rng:choice>
     <rng:ref name="model.labelLike"/>
     <rng:ref name="model.noteLike"/>
     <rng:ref name="model.biblLike"/>
    </rng:choice>
   </rng:zeroOrMore>
  </rng:group>
 </rng:choice>
</rng:element>

element trait
{
   att.global.attributes,
   att.datable.w3c.attributes,
   att.datable.iso.attributes,
   att.editLike.attributes,
   att.naming.attributes,
   att.typed.attributes,
   (
      trait+
    | ( model.headLike*, model.pLike+, ( model.noteLike | model.biblLike )* )
    | ( ( model.labelLike | model.noteLike | model.biblLike )* )
   )
}