<root>

<root> (root node) represents the root node of a tree. [19.2 Trees]
Modulenets — Graphs, Networks, and Trees
Attributesatt.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))
valueidentifies the root node of the network by pointing to a feature structure or other analytic element.
Status Optional
Datatype 

<rng:ref name="data.pointer"/>
data.pointer
childrenidentifies the elements which are the children of the root node.
Status Required
Datatype 1–∞ occurrences of 

<rng:ref name="data.pointer"/>
data.pointer
separated by whitespace
Note

If the root has no children (i.e., the tree is ‘trivial’), then the children attribute should be omitted.

ord(ordered) indicates whether or not the root is ordered.
Status Optional
Datatype 

<rng:ref name="data.xTruthValue"/>
data.xTruthValue
Note

The value true indicates that the children of the root are ordered, whereas false indicates the are unordered.

Use if and only if ord is specified as partial on the tree element and the root has more than one child.

outDegreegives the out degree of the root, the number of its children.
Status Optional
Datatype 

<rng:ref name="data.count"/>
data.count
Note

The in degree of the root is always 0.

Contained by
nets: tree
May contain
core: label
Declaration

<rng:element name="root">
 <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:attribute name="children">
  <rng:list>
   <rng:oneOrMore>
    <rng:ref name="data.pointer"/>
   </rng:oneOrMore>
  </rng:list>
 </rng:attribute>
 <rng:optional>
  <rng:attribute name="ord">
   <rng:ref name="data.xTruthValue"/>
  </rng:attribute>
 </rng:optional>
 <rng:optional>
  <rng:attribute name="outDegree">
   <rng:ref name="data.count"/>
  </rng:attribute>
 </rng:optional>
 <rng:optional>
  <rng:ref name="label"/>
 </rng:optional>
</rng:element>
element root
{
   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 }?,
   attribute children { list { data.pointer+ } },
   attribute ord { data.xTruthValue }?,
   attribute outDegree { data.count }?,
   label?
}
Example
<root xml:id="vp1" children="#vb1 #pn1"
 outDegree="2">
 <label>VP</label>
</root>
<leaf xml:id="vb1"/>
<leaf xml:id="pn1"/>