TEI: Guidelines for Electronic Text Encoding and Interchange

<layoutDesc>
<p>Most pages have between 25 and 32 long lines ruled in lead.</p>
</layoutDesc>

<layoutDesc>
<layout columns="2" ruledLines="42">
<p>
<locus from="f12r" to="f15v"/>
2 columns of 42 lines pricked and ruled in ink, with
central rule between the columns.</p>
</layout>
<layout columns="3">
<p>
<locus from="f16"/>Prickings for three columns are visible.</p>
</layout>
</layoutDesc>

XML syntaxCompact syntax

<rng:element name="layoutDesc">
 <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:choice>
 <rng:oneOrMore>
  <rng:ref name="model.pLike"/>
 </rng:oneOrMore>
 <rng:group>
  <rng:optional>
  <rng:ref name="summary"/>
  </rng:optional>
  <rng:oneOrMore>
  <rng:ref name="layout"/>
  </rng:oneOrMore>
 </rng:group>
 </rng:choice>
</rng:element>

element layoutDesc
{
 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,
 ( model.pLike+ | ( summary?, layout+ ) )
}