parentRef

parentRef
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Name

parentRef — Reference to a named pattern from the parent grammar

Class:

pattern

Synopsis

element parentRef
{
   attribute name { xsd:NCName },
   (
      attribute ns { text }?,
      attribute datatypeLibrary { xsd:anyURI }?,
      attribute * - (rng:* | local:*) { text }*
   ),
   ( element * - rng:* { ... }* )
}

May be included in:

attribute, choice, define, element, except, group, interleave, list, mixed, oneOrMore, optional, start, zeroOrMore.

Compact syntax equivalent:

parent

Description:

The parentRef pattern is a reference to a named pattern belonging to the parent grammar, i.e. the grammar in which the current grammar is included. The scope of a named pattern is usually limited to the grammar in which they are defined. The parentRef pattern provides a way to extend this scope and refer named pattern defined in the parent grammar.

Example:

  <define name="born-element">
    <element name="born">
      <text/>
    </element>
  </define>
  <define name="author-element">
    <grammar>
      <start>
        <element name="author">
          <attribute name="id"/>
          <ref name="name-element"/>
          <parentRef name="born-element"/>
          <optional>
            <ref name="died-element"/>
          </optional>
        </element>
      </start>
      <define name="name-element">
        <element name="name">
          <text/>
        </element>
      </define>
      <define name="died-element">
        <element name="died">
          <text/>
        </element>
      </define>
    </grammar>
  </define>

Attributes:

datatypeLibrary: The datatypeLibrary attribute defines the default datatype library. The value of datatypeLibrary is inherited.
name: The name attribute specifies the name of the named pattern which is referenced.
ns: The ns attribute defines the default namespace for the elements defined in a portion of schema. The value of ns is inherited.

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