<triangle>

<triangle> (underspecified embedding tree, so called because of its characteristic shape when drawn) 未定義の部分木(eTree)，すなわち情報が付与されていない部分木を示す． [19.3 Another Tree Notation]
モジュールnets — Graphs, Networks, and Trees
属性att.global (@xml:id, @n, @xml:lang, @xml:base, @xml:space) (att.global.rendition (@rend, @style, @rendition)) (att.global.linking (@corresp, @synch, @sameAs, @copyOf, @next, @prev, @exclude, @select)) (att.global.analytic (@ana)) (att.global.facs (@facs)) (att.global.change (@change)) (att.global.responsibility (@cert, @resp))
value省略部分木の値を示す．素性構造または他の分析要素の識別子になる．
状態 任意
データ型 

<rng:ref name="data.pointer"/>
data.pointer
上位
nets: eTree forest triangle
下位
core: label
nets: eLeaf eTree triangle
宣言

<rng:element name="triangle">
 <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:optional>
  <rng:attribute name="value">
   <rng:ref name="data.pointer"/>
  </rng:attribute>
 </rng:optional>
 <rng:group>
  <rng:optional>
   <rng:ref name="label"/>
  </rng:optional>
  <rng:zeroOrMore>
   <rng:choice>
    <rng:ref name="eTree"/>
    <rng:ref name="triangle"/>
    <rng:ref name="eLeaf"/>
   </rng:choice>
  </rng:zeroOrMore>
 </rng:group>
</rng:element>
element triangle
{
   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,
   attribute value { data.pointer }?,
   ( label?, ( eTree | triangle | eLeaf )* )
}
例
<triangle>
 <label>NP</label>
 <eLeaf>
  <label>the periscope</label>
 </eLeaf>
</triangle>
解説

0以上の部分木，省略部分木，部分木の葉が続く，選択的なラベル．