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Appendices

3 Syntax

XInclude defines a namespace associated with the URI http://www.w3.org/2001/XInclude. The XInclude namespace contains two elements with the local names include and fallback. For convenience, within this specification these elements are referred to as xi:include and xi:fallback respectively.

The following (non-normative) XML schema [XMLSchemas] illustrates the content model of the xi namespace:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:xi="http://www.w3.org/2001/XInclude"
           targetNamespace="http://www.w3.org/2001/XInclude"
           finalDefault="extension">

  <xs:element name="include" type="xi:includeType" />

  <xs:complexType name="includeType" mixed="true">
    <xs:choice minOccurs='0' maxOccurs='unbounded' >
      <xs:element ref='xi:fallback' />
      <xs:any namespace='##other' processContents='lax' />
      <xs:any namespace='##local' processContents='lax' />
    </xs:choice>
    <xs:attribute name="href" use="optional" type="xs:anyURI"/>
    <xs:attribute name="parse" use="optional" default="xml"
                  type="xi:parseType" />
    <xs:attribute name="xpointer" use="optional" type="xs:string"/>
    <xs:attribute name="encoding" use="optional" type="xs:string"/>
    <xs:attribute name="accept" use="optional" type="xs:string"/>
    <xs:attribute name="accept-language" use="optional" type="xs:string"/>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
  </xs:complexType>

  <xs:simpleType name="parseType">
    <xs:restriction base="xs:token">
      <xs:enumeration value="xml"/>
      <xs:enumeration value="text"/>
    </xs:restriction>
  </xs:simpleType>
  
  <xs:element name="fallback" type="xi:fallbackType" />

  <xs:complexType name="fallbackType" mixed="true">
    <xs:choice minOccurs="0" maxOccurs="unbounded">
      <xs:element ref="xi:include"/>
      <xs:any namespace="##other" processContents="lax"/>
      <xs:any namespace="##local" processContents="lax"/>
    </xs:choice>
    <xs:anyAttribute namespace="##other" processContents="lax" />
  </xs:complexType>

</xs:schema>