XML Pocket Reference, 3rd Edition

Name

rng:externalRef — References an external schema

XML syntax example

<element name="date" xmlns="http://relaxng.org/ns/
 structure/1.0">
<interleave>
 <element name="year">
  <list>
   <choice>
    <value>2002</value>
    <value>2003</value>
    <value>2004</value>
    <value>2005</value>
    <value>2006</value>
    <value>2007</value>
   </choice>
  </list>
 </element>
 <externalRef href="month.rng"/>
 <externalRef href="day.rng"/>
</interleave>
</element>

Compact syntax example

element date {
  element year {
    list { "2002" | "2003" | "2004" | "2005" | "2006" |
    "2007" }
  }
  & external "month.rnc"
  & external "day.rnc"
}

Attributes

href

The location of the external schema

Parents

attribute, choice (( ) and |), define (name of pattern followed by =), element, except (-), group (( ) and ,), interleave (&), list, mixed, oneOrMore (+), optional (?), start (start followed by =), zeroOrMore (*)

Description

The externalRef pattern references an external schema, in effect replacing the instance of the externalRef element with the content of the external schema. The external schema must contain a pattern.

See also

§9.1, include, parentRef, ref