<vAlt>

<vAlt> (替換值) 表示功能值細節的值部分資訊，包含一組值，僅其中一個得為有效值。 [19.8.1 Alternation]
組件 iso-fs — Feature Structures
屬性
俱乐部会员
model.featureVal.single
可包含在於
iso-fs: f fvLib if vAlt vColl vDefault vLabel vMerge vNot vRange
可包含
iso-fs: binary default fs numeric string symbol vAlt vColl vLabel vMerge vNot
例子
<f name="gender">
 <vAlt>
  <symbol value="masculine"/>
  <symbol value="neuter"/>
  <symbol value="feminine"/>
 </vAlt>
</f>
Content model 
<content>
 <sequence>
  <classRef key="model.featureVal"/>
  <classRef key="model.featureVal"
   minOccurs="1" maxOccurs="unbounded"/>
 </sequence>
</content>
宣告 
<rng:element name="vAlt">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.global.rendition.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.global.responsibility.attributes"/>
 <rng:ref name="att.global.source.attributes"/>
 <rng:group>
  <rng:ref name="model.featureVal"/>
  <rng:oneOrMore>
   <rng:ref name="model.featureVal"/>
  </rng:oneOrMore>
 </rng:group>
</rng:element>
element vAlt
{
   att.global.attributes,
   att.global.rendition.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   att.global.responsibility.attributes,
   att.global.source.attributes,
   ( model.featureVal, model.featureVal+ )
}