<?xml version="1.0" encoding="utf-8"?>
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<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'
       xmlns:xenc='http://www.w3.org/2001/04/xmlenc#'
           xmlns:tns='http://docs.oasis-open.org/wsfed/authorization/200706'
           targetNamespace='http://docs.oasis-open.org/wsfed/authorization/200706'
           elementFormDefault='qualified' >
  <xs:import namespace='http://www.w3.org/2001/04/xmlenc#'
             schemaLocation='xenc-schema.xsd'/>

  <!-- Section 9.2 -->
  <xs:element name='AdditionalContext' type='tns:AdditionalContextType' />
  <xs:complexType name='AdditionalContextType' >
    <xs:sequence>
      <xs:element name='ContextItem' type='tns:ContextItemType' minOccurs='0' maxOccurs='unbounded' />
      <xs:any namespace='##other' processContents='lax' minOccurs='0' maxOccurs='unbounded' />
    </xs:sequence>
    <xs:anyAttribute namespace='##other' processContents='lax' />
  </xs:complexType>

  <xs:complexType name='ContextItemType' >
    <xs:choice minOccurs='0'>
      <xs:element name='Value' type='xs:string' minOccurs='1' maxOccurs='1' />
      <xs:any namespace='##other' processContents='lax' minOccurs='1' maxOccurs='1' />
    </xs:choice>
    <xs:attribute name='Name' type='xs:anyURI' use='required' />
    <xs:attribute name='Scope' type='xs:anyURI' use='optional' />
    <xs:anyAttribute namespace='##other' processContents='lax' />
  </xs:complexType>

  <!-- Section 9.3 -->
  <xs:element name='ClaimType' type='tns:ClaimType' />
  <xs:complexType name='ClaimType' >
    <xs:sequence>
      <xs:element name="DisplayName" type="tns:DisplayNameType" minOccurs="0" maxOccurs="1" />
      <xs:element name="Description" type="tns:DescriptionType" minOccurs="0" maxOccurs="1" />
      <xs:element name="DisplayValue" type="tns:DisplayValueType" minOccurs="0" maxOccurs="1" />
      <xs:choice minOccurs='0'>
          <xs:element name='Value' type='xs:string' minOccurs='1' maxOccurs='1' />
        <xs:element name='EncryptedValue' type='tns:EncryptedValueType' minOccurs='1' maxOccurs='1' />
        <xs:element name='StructuredValue' type='tns:StructuredValueType' minOccurs='1' maxOccurs='1' />
        <xs:element name='ConstrainedValue' type='tns:ConstrainedValueType' minOccurs='1' maxOccurs='1' />
          <xs:any namespace='##other' processContents='lax' minOccurs='1' maxOccurs='1' />
        </xs:choice>
    </xs:sequence>
    <xs:attribute name='Uri' type='xs:anyURI' use='required' />
    <xs:attribute name='Optional' type='xs:boolean' use='optional' />
    <xs:anyAttribute namespace='##other' processContents='lax' />
  </xs:complexType>

  <xs:complexType name="DisplayNameType">
    <xs:simpleContent>
     <xs:extension base="xs:string">
        <xs:anyAttribute namespace="##other" processContents="lax" />
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="DescriptionType">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:anyAttribute namespace="##other" processContents="lax" />
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="DisplayValueType">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:anyAttribute namespace="##other" processContents="lax" />
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:complexType name="EncryptedValueType">
    <xs:sequence>
      <xs:element ref="xenc:EncryptedData" minOccurs="1" maxOccurs="1"/>
    </xs:sequence>
    <xs:attribute name="DecryptionCondition" type="xs:anyURI" use="optional"/>
  </xs:complexType>

  <xs:complexType name="StructuredValueType">
    <xs:sequence>
      <xs:any namespace='##other' processContents='lax' minOccurs='1' maxOccurs='unbounded' />
    </xs:sequence>
    <xs:anyAttribute namespace='##other' processContents='lax' />
  </xs:complexType>

  <!-- Section 9.3.1 -->

  <xs:complexType name='ConstrainedValueType'>
    <xs:sequence>
      <xs:choice minOccurs='1'>
        <xs:element name='ValueLessThan' type='tns:ConstrainedSingleValueType' minOccurs='1' maxOccurs='1'/>
        <xs:element name='ValueLessThanOrEqual' type='tns:ConstrainedSingleValueType' minOccurs='1' maxOccurs='1'/>
        <xs:element name='ValueGreaterThan' type='tns:ConstrainedSingleValueType' minOccurs='1' maxOccurs='1'/>
        <xs:element name='ValueGreaterThanOrEqual' type='tns:ConstrainedSingleValueType' minOccurs='1' maxOccurs='1'/>
        <xs:element name='ValueInRangen' type='tns:ValueInRangeType' minOccurs='1' maxOccurs='1'/>
        <xs:element name='ValueOneOf' type='tns:ConstrainedManyValueType' minOccurs='1' maxOccurs='1'/>
      </xs:choice>
      <xs:any namespace='##other' processContents='lax' minOccurs='1' maxOccurs='unbounded' />
    </xs:sequence>
    <xs:attribute name='AssertConstraint' type='xs:boolean' use='optional' />
  </xs:complexType>
  <xs:complexType name='ValueInRangeType'>
    <xs:sequence>
      <xs:element name='ValueUpperBound' type='tns:ConstrainedSingleValueType' minOccurs='1' maxOccurs='1'/>
      <xs:element name='ValueLowerBound' type='tns:ConstrainedSingleValueType' minOccurs='1' maxOccurs='1'/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name='ConstrainedSingleValueType'>
    <xs:choice minOccurs='0'>
      <xs:element name='Value' type='xs:string' minOccurs='1' maxOccurs='1' />
      <xs:element name='StructuredValue' type='tns:StructuredValueType' minOccurs='1' maxOccurs='1' />
    </xs:choice>
  </xs:complexType>

  <xs:complexType name='ConstrainedManyValueType'>
    <xs:choice minOccurs='0'>
      <xs:element name='Value' type='xs:string' minOccurs='1' maxOccurs='unbounded' />
      <xs:element name='StructuredValue' type='tns:StructuredValueType' minOccurs='1' maxOccurs='unbounded' />
    </xs:choice>
  </xs:complexType>

</xs:schema>
