P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="docTitle">
 <rng:ref name="att.global.attributes"/>
 <rng:group>
  <rng:zeroOrMore>
   <rng:ref name="model.global"/>
  </rng:zeroOrMore>
  <rng:oneOrMore>
   <rng:ref name="titlePart"/>
   <rng:zeroOrMore>
    <rng:ref name="model.global"/>
   </rng:zeroOrMore>
  </rng:oneOrMore>
 </rng:group>
</rng:element>

element docTitle
{
   att.global.attributes,
   ( model.global*, ( titlePart, model.global* )+ )
}