P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="fsConstraints">
 <rng:ref name="att.global.attributes"/>
 <rng:zeroOrMore>
  <rng:choice>
   <rng:ref name="cond"/>
   <rng:ref name="bicond"/>
  </rng:choice>
 </rng:zeroOrMore>
</rng:element>

element fsConstraints { att.global.attributes, ( cond | bicond )* }