<leaf>

<leaf> encodes the leaves (terminal nodes) of a tree. 19.2 Trees
組件nets — 19 Graphs, Networks, and Trees
屬性att.global (@xml:id, @n, @xml:lang, @rend, @rendition, @xml:base, @xml:space) (att.global.linking (@corresp, @synch, @sameAs, @copyOf, @next, @prev, @exclude, @select)) (att.global.analytic (@ana)) (att.global.facs (@facs)) (att.global.change (@change))
valueprovides a pointer to a feature structure or other analytic element.
狀態 非必備的
資料類型 

<rng:ref name="data.pointer"/>
data.pointer
值 A valid identifier of a feature structure or other analytic element.
parentprovides the identifier of parent of a leaf.
狀態 非必備的
資料類型 

<rng:ref name="data.pointer"/>
data.pointer
值 The identifier of the parent node.
followprovides an identifier of an element which this leaf follows.
狀態 非必備的
資料類型 

<rng:ref name="data.pointer"/>
data.pointer
值 The identifier of another intermediate node or leaf of the tree.
屬於
可包含在於
nets: tree
可包含
core: label
宣告

<rng:element name="leaf">
 <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:optional>
  <rng:attribute name="value">
   <rng:ref name="data.pointer"/>
  </rng:attribute>
 </rng:optional>
 <rng:optional>
  <rng:attribute name="parent">
   <rng:ref name="data.pointer"/>
  </rng:attribute>
 </rng:optional>
 <rng:optional>
  <rng:attribute name="follow">
   <rng:ref name="data.pointer"/>
  </rng:attribute>
 </rng:optional>
 <rng:optional>
  <rng:ref name="label"/>
 </rng:optional>
</rng:element>
element leaf
{
   att.global.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   attribute value { data.pointer }?,
   attribute parent { data.pointer }?,
   attribute follow { data.pointer }?,
   label?
}
例子
<leaf xml:id="peri1" parent="#n1">
 <label>periscope</label>
</leaf>