P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="taxonomy">
<rng:ref name="att.global.attributes"/>
<rng:choice>
 <rng:zeroOrMore>
  <rng:ref name="model.glossLike"/>
 </rng:zeroOrMore>
 <rng:oneOrMore>
  <rng:ref name="category"/>
 </rng:oneOrMore>
 <rng:group>
  <rng:group>
<!-- this group a hack for odd2dtd processing -->
   <rng:ref name="model.biblLike"/>
  </rng:group>
  <rng:zeroOrMore>
   <rng:ref name="category"/>
  </rng:zeroOrMore>
 </rng:group>
</rng:choice>
</rng:element>

element taxonomy
{
   att.global.attributes,
   ( model.glossLike* | category+ | ( ( model.biblLike ), category* ) )
}