XInclude.xsd

<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:annotation>
   <xs:documentation>
    Not normative, but may be useful.
    See the REC http://www.w3.org/TR/XInclude for definitive
    information about this namespace.
   </xs:documentation>
  </xs:annotation>

  <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>