P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="fsdDecl">
<rng:ref name="att.global.attributes"/>
<rng:oneOrMore>
 <rng:choice>
  <rng:ref name="fsDecl"/>
  <rng:ref name="fsdLink"/>
 </rng:choice>
</rng:oneOrMore>
</rng:element>

element fsdDecl { att.global.attributes, ( fsDecl | fsdLink )+ }