choice (in the context of a pattern)

choice (in the context of a pattern)
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Name

choice (in the context of a pattern) — choice pattern

Class:

pattern

Synopsis

element choice
{
   (
      attribute ns { text }?,
      attribute datatypeLibrary { xsd:anyURI }?,
      attribute * - (rng:* | local:*) { text }*
   ),
   (
      ( element * - rng:* { ... }* )
    & (
         element element { ... }
       | element attribute { ... }
       | element group { ... }
       | element interleave { ... }
       | element choice { ... }
       | element optional { ... }
       | element zeroOrMore { ... }
       | element oneOrMore { ... }
       | element list { ... }
       | element mixed { ... }
       | element ref { ... }
       | element parentRef { ... }
       | element empty { ... }
       | element text { ... }
       | element value { ... }
       | element data { ... }
       | element notAllowed { ... }
       | element externalRef { ... }
       | element grammar { ... }
      )+
   )
}

May be included in:

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

Compact syntax equivalent:

pattern|pattern

Description:

The choice pattern defines a choice between different patterns: it matches a node if and only if at least one of its sub-patterns matches this node.

Example:

   <element name="name">
    <choice>
     <text/>
     <group>
      <element name="first"><text/></element>
      <optional>
        <element name="middle"><text/></element>
      </optional>
      <element name="last"><text/></element>
     </group>
    </choice>
   </element>

   <attribute name="available">
     <choice>
      <value>true</value>
      <value>false</value>
      <value>who knows?</value>
     </choice>
    </attribute>

    <start>
      <ref name="libraryElement"/>
      <ref name="bookElement"/>
    </start>

Attributes:

datatypeLibrary: The datatypeLibrary attribute defines the default datatype library. The value of datatypeLibrary is inherited.
ns: The ns attribute defines the default namespace for the elements defined in a portion of a schema. The value of ns is inherited.

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