P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="monogr">
<rng:ref name="att.global.attributes"/>
<rng:group>
 <rng:optional>
  <rng:choice>
   <rng:group>
    <rng:choice>
     <rng:ref name="author"/>
     <rng:ref name="editor"/>
     <rng:ref name="respStmt"/>
    </rng:choice>
    <rng:zeroOrMore>
     <rng:choice>
      <rng:ref name="author"/>
      <rng:ref name="editor"/>
      <rng:ref name="respStmt"/>
     </rng:choice>
    </rng:zeroOrMore>
    <rng:oneOrMore>
     <rng:ref name="title"/>
    </rng:oneOrMore>
    <rng:zeroOrMore>
     <rng:choice>
      <rng:ref name="editor"/>
      <rng:ref name="respStmt"/>
     </rng:choice>
    </rng:zeroOrMore>
   </rng:group>
   <rng:group>
    <rng:oneOrMore>
     <rng:ref name="title"/>
    </rng:oneOrMore>
    <rng:zeroOrMore>
     <rng:choice>
      <rng:ref name="author"/>
      <rng:ref name="editor"/>
      <rng:ref name="respStmt"/>
     </rng:choice>
    </rng:zeroOrMore>
   </rng:group>
  </rng:choice>
 </rng:optional>
 <rng:zeroOrMore>
  <rng:choice>
   <rng:ref name="model.noteLike"/>
   <rng:ref name="meeting"/>
  </rng:choice>
 </rng:zeroOrMore>
 <rng:zeroOrMore>
  <rng:ref name="edition"/>
  <rng:zeroOrMore>
   <rng:choice>
    <rng:ref name="editor"/>
    <rng:ref name="respStmt"/>
   </rng:choice>
  </rng:zeroOrMore>
 </rng:zeroOrMore>
 <rng:ref name="imprint"/>
 <rng:zeroOrMore>
  <rng:choice>
   <rng:ref name="imprint"/>
   <rng:ref name="extent"/>
   <rng:ref name="biblScope"/>
  </rng:choice>
 </rng:zeroOrMore>
</rng:group>
</rng:element>

element monogr
{
   att.global.attributes,
   (
      (
         (
            ( author | editor | respStmt ),
            ( author | editor | respStmt )*,
            title+,
            ( editor | respStmt )*
         )
       | ( title+, ( author | editor | respStmt )* )
      )?,
      ( model.noteLike | meeting )*,
      ( edition, ( editor | respStmt )* )*,
      imprint,
      ( imprint | extent | biblScope )*
   )
}