P5: TEI指引

<rng:element name="relatedItem">
<rng:ref name="att.global.attributes"/>
<rng:ref name="att.typed.attributes"/>
<rng:choice>
 <rng:ref name="model.biblLike"/>
 <rng:ref name="model.ptrLike"/>
</rng:choice>
</rng:element>

element relatedItem
{
   att.global.attributes,
   att.typed.attributes,
   ( model.biblLike | model.ptrLike )
}