P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="height">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.dimensions.attributes"/>
 <rng:ref name="macro.xtext"/>
</rng:element>

element height
{
   att.global.attributes,
   att.dimensions.attributes,
   macro.xtext
}