<?xml version="1.0" encoding="UTF-8"?>
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<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy" xmlns:wsa="http://www.w3.org/2005/08/addressing" xmlns:wst="http://docs.oasis-open.org/ws-sx/ws-trust/200512/" targetNamespace="http://docs.oasis-open.org/ws-sx/ws-trust/200512/" elementFormDefault="qualified">

  <xs:import namespace="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" schemaLocation="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd"/>
  <xs:import namespace="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" schemaLocation="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"/>
  <xs:import namespace="http://schemas.xmlsoap.org/ws/2004/09/policy" schemaLocation="http://schemas.xmlsoap.org/ws/2004/09/policy/ws-policy.xsd"/>
  <xs:import namespace="http://www.w3.org/2005/08/addressing" schemaLocation="http://www.w3.org/2006/03/addressing/ws-addr.xsd"/>

  <!-- WS-Trust Section 3.1 -->
  <xs:element name="RequestSecurityToken" type="wst:RequestSecurityTokenType"/>
  <xs:complexType name="RequestSecurityTokenType">
    <xs:annotation>
      <xs:documentation>
        Actual content model is non-deterministic, hence wildcard. The following shows intended content model:

        &lt;xs:element ref='wst:TokenType' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:RequestType' /&gt;
        &lt;xs:element ref='wsp:AppliesTo' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Claims' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Entropy' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Lifetime' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:AllowPostdating' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Renewing' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:OnBehalfOf' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Issuer' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:AuthenticationType' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:KeyType' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:KeySize' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:SignatureAlgorithm' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Encryption' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:EncryptionAlgorithm' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:CanonicalizationAlgorithm' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:ProofEncryption' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:UseKey' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:SignWith' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:EncryptWith' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:DelegateTo' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Forwardable' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Delegatable' minOccurs='0' /&gt;
        &lt;xs:element ref='wsp:Policy' minOccurs='0' /&gt;
        &lt;xs:element ref='wsp:PolicyReference' minOccurs='0' /&gt;
        &lt;xs:any namespace='##other' processContents='lax' minOccurs='0' maxOccurs='unbounded' /&gt;

      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="Context" type="xs:anyURI" use="optional"/>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
  </xs:complexType>

  <xs:element name="TokenType" type="xs:anyURI"/>

  <xs:element name="RequestType" type="wst:RequestTypeOpenEnum"/>

  <xs:simpleType name="RequestTypeOpenEnum">
    <xs:union memberTypes="wst:RequestTypeEnum xs:anyURI"/>
  </xs:simpleType>

  <xs:simpleType name="RequestTypeEnum">
    <xs:restriction base="xs:anyURI">
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/Issue"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/Renew"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/Cancel"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/STSCancel"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/Validate"/>
    </xs:restriction>
  </xs:simpleType>

  <!-- WS-Trust Section 3.2 -->
  <xs:element name="RequestSecurityTokenResponse" type="wst:RequestSecurityTokenResponseType"/>
  <xs:complexType name="RequestSecurityTokenResponseType">
    <xs:annotation>
      <xs:documentation>
        Actual content model is non-deterministic, hence wildcard. The following shows intended content model:

        &lt;xs:element ref='wst:TokenType' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:RequestType' /&gt;
        &lt;xs:element ref='wst:RequestedSecurityToken'  minOccurs='0' /&gt;
        &lt;xs:element ref='wsp:AppliesTo' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:RequestedAttachedReference' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:RequestedUnattachedReference' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:RequestedProofToken' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Entropy' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Lifetime' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Status' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:AllowPostdating' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Renewing' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:OnBehalfOf' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Issuer' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:AuthenticationType' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Authenticator' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:KeyType' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:KeySize' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:SignatureAlgorithm' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Encryption' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:EncryptionAlgorithm' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:CanonicalizationAlgorithm' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:ProofEncryption' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:UseKey' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:SignWith' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:EncryptWith' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:DelegateTo' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Forwardable' minOccurs='0' /&gt;
        &lt;xs:element ref='wst:Delegatable' minOccurs='0' /&gt;
        &lt;xs:element ref='wsp:Policy' minOccurs='0' /&gt;
        &lt;xs:element ref='wsp:PolicyReference' minOccurs='0' /&gt;
        &lt;xs:any namespace='##other' processContents='lax' minOccurs='0' maxOccurs='unbounded' /&gt;

      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="Context" type="xs:anyURI" use="optional"/>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
  </xs:complexType>

  <xs:element name="RequestedSecurityToken" type="wst:RequestedSecurityTokenType"/>
  <xs:complexType name="RequestedSecurityTokenType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax"/>
    </xs:sequence>
  </xs:complexType>

  <!-- WS-Trust Section 3.3 -->
  <xs:element name="BinarySecret" type="wst:BinarySecretType"/>
  <xs:complexType name="BinarySecretType">
    <xs:simpleContent>
      <xs:extension base="xs:base64Binary">
        <xs:attribute name="Type" type="wst:BinarySecretTypeOpenEnum" use="optional"/>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:simpleType name="BinarySecretTypeEnum">
    <xs:restriction base="xs:anyURI">
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/AsymmetricKey"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/SymmetricKey"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/Nonce"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="BinarySecretTypeOpenEnum">
    <xs:union memberTypes="wst:BinarySecretTypeEnum xs:anyURI"/>
  </xs:simpleType>


  <!-- WS-Trust Section 4.1 -->
  <xs:element name="Claims" type="wst:ClaimsType"/>
  <xs:complexType name="ClaimsType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="Dialect" type="xs:anyURI" use="optional"/>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
  </xs:complexType>

  <xs:element name="Entropy" type="wst:EntropyType"/>
  <xs:complexType name="EntropyType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
  </xs:complexType>

  <xs:element name="Lifetime" type="wst:LifetimeType"/>
  <xs:complexType name="LifetimeType">
    <xs:sequence>
      <xs:element ref="wsu:Created" minOccurs="0"/>
      <xs:element ref="wsu:Expires" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>

  <!-- WS-Trust Section 4.2 -->
  <xs:element name="RequestSecurityTokenCollection" type="wst:RequestSecurityTokenCollectionType"/>
  <xs:complexType name="RequestSecurityTokenCollectionType">
    <xs:annotation>
      <xs:documentation>
        The RequestSecurityTokenCollection (RSTC) element is used to provide multiple RST requests. 
        One or more RSTR elements in an RSTRC element are returned in the response to the RequestSecurityTokenCollection.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="RequestSecurityToken" type="wst:RequestSecurityTokenType" minOccurs="2" maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="RequestSecurityTokenResponseCollection" type="wst:RequestSecurityTokenResponseCollectionType"/>
  <xs:complexType name="RequestSecurityTokenResponseCollectionType">
    <xs:annotation>
      <xs:documentation>
        The &lt;wst:RequestSecurityTokenResponseCollection&gt; element (RSTRC) MUST be used to return a security token or 
        response to a security token request on the final response.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element ref="wst:RequestSecurityTokenResponse" minOccurs="1" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
  </xs:complexType>

  <!-- WS-Trust Section 4.3 -->
  <xs:element name="ComputedKey" type="wst:ComputedKeyOpenEnum"/>
  <xs:simpleType name="ComputedKeyEnum">
    <xs:restriction base="xs:anyURI">
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/CK/PSHA1"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/CK/HASH"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="ComputedKeyOpenEnum">
    <xs:union memberTypes="wst:ComputedKeyEnum xs:anyURI"/>
  </xs:simpleType>

  <xs:element name="RequestedAttachedReference" type="wst:RequestedReferenceType"/>
  <xs:element name="RequestedUnattachedReference" type="wst:RequestedReferenceType"/>
  <xs:complexType name="RequestedReferenceType">
    <xs:sequence>
      <xs:element ref="wsse:SecurityTokenReference"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="RequestedProofToken" type="wst:RequestedProofTokenType"/>
  <xs:complexType name="RequestedProofTokenType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax"/>
    </xs:sequence>
  </xs:complexType>

  <!-- WS-Trust Section 6.4 -->
  <xs:element name="IssuedTokens" type="wst:RequestSecurityTokenResponseCollectionType"/>

  <!-- WS-Trust Section 5 -->
  <xs:element name="RenewTarget" type="wst:RenewTargetType"/>
  <xs:complexType name="RenewTargetType">
    <xs:sequence>
      <xs:any namespace="##other" minOccurs="1" maxOccurs="1"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="AllowPostdating" type="wst:AllowPostdatingType"/>
  <xs:complexType name="AllowPostdatingType"/>

  <xs:element name="Renewing" type="wst:RenewingType"/>
  <xs:complexType name="RenewingType">
    <xs:attribute name="Allow" type="xs:boolean" use="optional"/>
    <xs:attribute name="OK" type="xs:boolean" use="optional"/>
  </xs:complexType>

  <!-- WS-Trust Section 6 -->
  <xs:element name="CancelTarget" type="wst:CancelTargetType"/>
  <xs:complexType name="CancelTargetType">
    <xs:sequence>
      <xs:any namespace="##other" minOccurs="1" maxOccurs="1"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="RequestedTokenCancelled" type="wst:RequestedTokenCancelledType"/>
  <xs:complexType name="RequestedTokenCancelledType"/>

  <!-- WS-Trust Section 7 -->
  <xs:element name="ValidateTarget" type="wst:ValidateTargetType"/>
  <xs:complexType name="ValidateTargetType">
    <xs:sequence>
      <xs:any namespace="##other" minOccurs="1" maxOccurs="1"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="Status" type="wst:StatusType"/>
  <xs:complexType name="StatusType">
    <xs:sequence>
      <xs:element name="Code" type="wst:StatusCodeOpenEnum"/>
      <xs:element name="Reason" type="xs:string" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>

  <xs:simpleType name="StatusCodeEnum">
    <xs:restriction base="xs:anyURI">
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/status/valid"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/status/invalid"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="StatusCodeOpenEnum">
    <xs:union memberTypes="wst:StatusCodeEnum xs:anyURI"/>
  </xs:simpleType>

  <!-- WS-Trust Section 8.2 -->
  <xs:element name="SignChallenge" type="wst:SignChallengeType"/>
  <xs:element name="SignChallengeResponse" type="wst:SignChallengeType"/>
  <xs:complexType name="SignChallengeType">
    <xs:sequence>
      <xs:element ref="wst:Challenge"/>
      <xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:anyAttribute namespace="##any" processContents="lax"/>
  </xs:complexType>

  <xs:element name="Challenge" type="xs:string"/>


  <!-- WS-Trust Section 8.3 -->
  <xs:element name="BinaryExchange" type="wst:BinaryExchangeType"/>
  <xs:complexType name="BinaryExchangeType">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="ValueType" type="xs:anyURI" use="required"/>
        <xs:attribute name="EncodingType" type="xs:anyURI" use="required"/>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <!-- WS-Trust Section 8.4 -->
  <xs:element name="RequestKET" type="wst:RequestKETType"/>
  <xs:complexType name="RequestKETType"/>

  <xs:element name="KeyExchangeToken" type="wst:KeyExchangeTokenType"/>
  <xs:complexType name="KeyExchangeTokenType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>

  <!-- WS-Trust Section 8.9 -->
  <xs:element name="Authenticator" type="wst:AuthenticatorType"/>
  <xs:complexType name="AuthenticatorType">
    <xs:sequence>
      <xs:element ref="wst:CombinedHash" minOccurs="0"/>
      <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="CombinedHash" type="xs:base64Binary"/>

  <!-- WS-Trust Section 9.1 -->
  <xs:element name="OnBehalfOf" type="wst:OnBehalfOfType"/>
  <xs:complexType name="OnBehalfOfType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="Issuer" type="wsa:EndpointReferenceType"/>

  <!-- WS-Trust Section 9.2 -->
  <xs:element name="AuthenticationType" type="xs:anyURI"/>

  <xs:element name="KeyType" type="wst:KeyTypeOpenEnum"/>
  <xs:simpleType name="KeyTypeEnum">
    <xs:restriction base="xs:anyURI">
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/PublicKey"/>
      <xs:enumeration value="http://docs.oasis-open.org/ws-sx/ws-trust/200512/SymmetricKey"/>
      <xs:enumeration value="http://docs.oasis-open.org/wssx/wstrust/200512/Bearer"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="KeyTypeOpenEnum">
    <xs:union memberTypes="wst:KeyTypeEnum xs:anyURI"/>
  </xs:simpleType>

  <xs:element name="KeySize" type="xs:unsignedInt"/>

  <xs:element name="SignatureAlgorithm" type="xs:anyURI"/>
  <xs:element name="EncryptionAlgorithm" type="xs:anyURI"/>
  <xs:element name="CanonicalizationAlgorithm" type="xs:anyURI"/>
  <xs:element name="ComputedKeyAlgorithm" type="xs:anyURI"/>

  <xs:element name="Encryption" type="wst:EncryptionType"/>
  <xs:complexType name="EncryptionType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="ProofEncryption" type="wst:ProofEncryptionType"/>
  <xs:complexType name="ProofEncryptionType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="UseKey" type="wst:UseKeyType"/>
  <xs:complexType name="UseKeyType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax" minOccurs="0"/>
    </xs:sequence>
    <xs:attribute name="Sig" type="xs:anyURI" use="optional"/>
  </xs:complexType>

  <xs:element name="KeyWrapAlgorithm" type="xs:anyURI"/>
  <xs:element name="SignWith" type="xs:anyURI"/>
  <xs:element name="EncryptWith" type="xs:anyURI"/>

  <!-- WS-Trust Section 9.3 -->
  <xs:element name="DelegateTo" type="wst:DelegateToType"/>
  <xs:complexType name="DelegateToType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="Forwardable" type="xs:boolean"/>
  <xs:element name="Delegatable" type="xs:boolean"/>

  <!-- WS-Trust Section 9.5 -->
  <xs:element name="Participants" type="wst:ParticipantsType"/>
  <xs:complexType name="ParticipantsType">
    <xs:sequence>
      <xs:element name="Primary" type="wst:ParticipantType" minOccurs="0"/>
      <xs:element name="Participant" type="wst:ParticipantType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="ParticipantType">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax"/>
    </xs:sequence>
  </xs:complexType>

</xs:schema>
