root

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C Elements

<root>

<root> (root node) represents the root node of a tree. 19.2 Trees

Modul

Attribute

value

provides the value of the root, which is a feature structure or other analytic element.

Zustand	Vorgeschrieben wenn zutreffend
Datentyp	<rng:ref name="data.pointer"/> data.pointer
Werte	A valid identifier of a feature structure or other analytic element.

children

provides a list of identifiers of the elements which are the children of the root node.

Zustand	Obligatorisch
Datentyp	1–∞ occurrences of <rng:ref name="data.pointer"/> data.pointer separated by whitespace
Werte	A list of valid identifiers.
Anmerkung	If the root has no children (i.e., the tree is ‘trivial’), then the children attribute must be omitted. For technical reasons, it cannot be specified as root children=''.

ord

(ordered) indicates whether or not the root is ordered.

Zustand	Vorgeschrieben wenn zutreffend
Datentyp	<rng:ref name="data.xTruthValue"/> data.xTruthValue
Anmerkung	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.

outDegree

gives the out degree of the root, the number of its children.

Zustand	Optional
Datentyp	<rng:ref name="data.count"/> data.count
Werte	A nonnegative integer.
Anmerkung	The in degree of the root is always 0.

Verwendet von

tree

Kann enthalten

core: label

Deklaration


<rng:element name="root">
<rng:ref name="att.global.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,
   attribute value { data.pointer }?,
   attribute children { list { data.pointer+ } },
   attribute ord { data.xTruthValue }?,
   attribute outDegree { data.count }?,
   label?
}

Beispiel

P5: Guidelines for Electronic Text Encoding and Interchange

<root>