P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="ptr">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.global.rendition.attributes"/>
 <rng:ref name="att.global.linking.attributes"/>
 <rng:ref name="att.global.analytic.attributes"/>
 <rng:ref name="att.global.facs.attributes"/>
 <rng:ref name="att.global.change.attributes"/>
 <rng:ref name="att.global.responsibility.attributes"/>
 <rng:ref name="att.pointing.attributes"/>
 <rng:ref name="att.internetMedia.attributes"/>
 <rng:ref name="att.typed.attributes"/>
 <rng:ref name="att.declaring.attributes"/>
 <rng:ref name="att.cReferencing.attributes"/>
 <rng:empty/>
</rng:element>

element ptr
{
   att.global.attributes,
   att.global.rendition.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   att.global.responsibility.attributes,
   att.pointing.attributes,
   att.internetMedia.attributes,
   att.typed.attributes,
   att.declaring.attributes,
   att.cReferencing.attributes,
   empty
}