P5: Linee guida per la codifica e l'interscambio del testo elettronico

<rng:element name="l">
<rng:ref name="att.global.attributes"/>
<rng:ref name="att.metrical.attributes"/>
<rng:ref name="att.enjamb.attributes"/>
<rng:optional>
 <rng:attribute name="part" a:defaultValue="N">
  <rng:choice>
   <rng:value>Y</rng:value>
   <rng:value>N</rng:value>
   <rng:value>I</rng:value>
   <rng:value>M</rng:value>
   <rng:value>F</rng:value>
  </rng:choice>
 </rng:attribute>
</rng:optional>
<rng:ref name="macro.paraContent"/>
</rng:element>

element l
{
   att.global.attributes,
   att.metrical.attributes,
   att.enjamb.attributes,
   attribute part { "Y" | "N" | "I" | "M" | "F" }?,
   macro.paraContent
}