P5: TEI指引

<rng:element name="shift">
 <rng:ref name="att.global.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.ascribed.attributes"/>
 <rng:optional>
  <rng:attribute name="feature">
   <rng:choice>
    <rng:value>tempo</rng:value>
    <rng:value>loud</rng:value>
    <rng:value>pitch</rng:value>
    <rng:value>tension</rng:value>
    <rng:value>rhythm</rng:value>
    <rng:value>voice</rng:value>
   </rng:choice>
  </rng:attribute>
 </rng:optional>
 <rng:optional>
  <rng:attribute name="new" a:defaultValue="normal">
   <rng:ref name="data.enumerated"/>
  </rng:attribute>
 </rng:optional>
 <rng:empty/>
</rng:element>

element shift
{
   att.global.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   att.ascribed.attributes,
   attribute feature
   {
      "tempo" | "loud" | "pitch" | "tension" | "rhythm" | "voice"
   }?,
   attribute new { data.enumerated }?,
   empty
}