TEI: Guidelines for Electronic Text Encoding and Interchange

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

element ref
{
 att.global.attributes,
 att.global.analytic.attributes,
 att.global.change.attributes,
 att.global.facs.attributes,
 att.global.linking.attributes,
 att.global.rendition.attributes,
 att.global.responsibility.attributes,
 att.global.source.attributes,
 att.cReferencing.attributes,
 att.cmc.attributes,
 att.declaring.attributes,
 att.internetMedia.attributes,
 att.pointing.attributes,
 att.typed.attributes,
 macro.paraContent
}