Metadata Description Schema

Following is a reproduction of liberty-metadata-1.0-errata-v1.0.xsd, the XSD file that accompanies the Liberty Metadata Description and Discovery Specification. This XSD file describes metadata, protocols for obtaining metadata, and resolution methods for discovering the location of metadata.
Example B–6 Metadata Description and Discovery XSD File

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="urn:liberty:metadata:2003-08" xmlns="urn:liberty:metadata:2003-08" 
xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion" 
xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" 
attributeFormDefault="unqualified" version="1.0">
  <xs:import namespace="http://www.w3.org/2000/09/xmldsig#" 
   schemaLocation="http://www.w3.org/TR/xmldsig-core/xmldsig-core-schema.xsd"/>
  <xs:import namespace="urn:oasis:names:tc:SAML:1.0:assertion" 
   schemaLocation="oasis-sstc-saml-schema-assertion-1.1.xsd"/>
  <xs:import namespace="http://www.w3.org/XML/1998/namespace" 
   schemaLocation="http://www.w3.org/2001/xml.xsd"/>
  <xs:include schemaLocation="liberty-utility-v1.0.xsd"/>
  <xs:annotation>
    <xs:documentation>XML Schema fom Metadata description and discovery protocols</xs:documentation>
    <xs:documentation>The source code in this XSD file was excerpted verbatim from:

Liberty Metadata Description and Discovery Specification
Version 1.0
12th November 2003

Copyright (c) 2003 Liberty Alliance participants, see
https://www.projectliberty.org/specs/idff_copyrights.html

</xs:documentation>
  </xs:annotation>
  <xs:simpleType name="entityIDType">
    <xs:restriction base="xs:anyURI">
      <xs:maxLength value="1024" id="maxlengthid"/>
    </xs:restriction>
  </xs:simpleType>
  <xs:attribute name="libertyPrincipalIdentifier" type="entityIDType"/>
  <xs:attribute name="providerID" type="entityIDType"/>
  <xs:attribute name="validUntil" type="xs:dateTime"/>
  <xs:attribute name="cacheDuration" type="xs:duration"/>
  <xs:complexType name="additionalMetadataLocationType">
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attribute name="namespace" type="xs:anyURI"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="organizationType">
    <xs:sequence>
      <xs:element name="OrganizationName" type="organizationNameType" maxOccurs="unbounded"/>
      <xs:element name="OrganizationDisplayName" type="organizationDisplayNameType" maxOccurs="unbounded"/>
      <xs:element name="OrganizationURL" type="localizedURIType" maxOccurs="unbounded"/>
      <xs:element ref="Extension" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="organizationNameType">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute ref="xml:lang"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="organizationDisplayNameType">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute ref="xml:lang" use="required"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="localizedURIType">
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attribute ref="xml:lang" use="required"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="contactType">
    <xs:sequence>
      <xs:element name="Company" type="xs:string" minOccurs="0"/>
      <xs:element name="GivenName" type="xs:string" minOccurs="0"/>
      <xs:element name="SurName" type="xs:string" minOccurs="0"/>
      <xs:element name="EmailAddress" type="xs:anyURI" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="TelephoneNumber" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element ref="Extension" minOccurs="0"/>
    </xs:sequence>
    <xs:attribute ref="libertyPrincipalIdentifier" use="optional"/>
    <xs:attribute name="contactType" type="attr.contactType" use="required"/>
  </xs:complexType>
  <xs:simpleType name="attr.contactType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="technical"/>
      <xs:enumeration value="administrative"/>
      <xs:enumeration value="billing"/>
      <xs:enumeration value="other"/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name="keyTypes">
    <xs:restriction base="xs:string">
      <xs:enumeration value="encryption"/>
      <xs:enumeration value="signing"/>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="providerDescriptorType">
    <xs:sequence>
      <xs:element name="KeyDescriptor" type="keyDescriptorType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="SoapEndpoint" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="SingleLogoutServiceURL" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="SingleLogoutServiceReturnURL" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="FederationTerminationServiceURL" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="FederationTerminationServiceReturnURL" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="FederationTerminationNotificationProtocolProfile" type="xs:anyURI" 
       minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="SingleLogoutProtocolProfile" type="xs:anyURI" minOccurs="0" 
       maxOccurs="unbounded"/>
      <xs:element name="RegisterNameIdentifierProtocolProfile" type="xs:anyURI" minOccurs="0" 
       maxOccurs="unbounded"/>
      <xs:element name="RegisterNameIdentifierServiceURL" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="RegisterNameIdentifierServiceReturnURL" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="NameIdentifierMappingProtocolProfile" type="saml:AuthorityBindingType" 
       minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="NameIdentifierMappingEncryptionProfile" type="xs:anyURI" minOccurs="0" 
       maxOccurs="unbounded"/>
      <xs:element name="Organization" type="organizationType" minOccurs="0"/>
      <xs:element name="ContactPerson" type="contactType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="AdditionalMetaLocation" type="additionalMetadataLocationType" 
       minOccurs="0" maxOccurs="unbounded"/>
      <xs:element ref="Extension" minOccurs="0"/>
      <xs:element ref="ds:Signature" minOccurs="0"/>
    </xs:sequence>
    <!--xs:attribute ref="providerID" use="required"/-->
    <xs:attribute name="protocolSupportEnumeration" type="xs:NMTOKENS" use="required"/>
    <xs:attribute name="id" type="xs:ID" use="optional"/>
    <xs:attribute ref="validUntil" use="optional"/>
    <xs:attribute ref="cacheDuration" use="optional"/>
  </xs:complexType>
  <!--added-->
  <xs:element name="KeyDescriptor" type="keyDescriptorType"/>
  <xs:complexType name="keyDescriptorType">
    <xs:sequence>
      <xs:element name="EncryptionMethod" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="KeySize" type="xs:integer" minOccurs="0"/>
      <xs:element ref="ds:KeyInfo" minOccurs="0"/>
      <xs:element ref="Extension" minOccurs="0"/>
    </xs:sequence>
    <xs:attribute name="use" type="keyTypes" use="optional"/>
  </xs:complexType>
  <!-- -->
  <xs:element name="EntityDescriptor" type="entityDescriptorType"/>
  <xs:group name="providerGroup">
    <xs:sequence>
      <xs:element name="IDPDescriptor" type="IDPDescriptorType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="SPDescriptor" type="SPDescriptorType" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:group>
  <xs:complexType name="entityDescriptorType">
    <xs:sequence>
      <xs:choice>
        <xs:group ref="providerGroup"/>
        <xs:element name="AffiliationDescriptor" type="affiliationDescriptorType"/>
      </xs:choice>
      <xs:element name="ContactPerson" type="contactType" minOccurs="0"/>
      <xs:element name="Organization" type="organizationType" minOccurs="0"/>
      <xs:element ref="Extension" minOccurs="0"/>
      <xs:element ref="ds:Signature" minOccurs="0"/>
    </xs:sequence>
    <xs:attribute ref="providerID" use="required"/>
    <xs:attribute name="id" type="xs:ID" use="optional"/>
    <xs:attribute ref="validUntil" use="optional"/>
    <xs:attribute ref="cacheDuration" use="optional"/>
  </xs:complexType>
  <xs:complexType name="SPDescriptorType">
    <xs:complexContent>
      <xs:extension base="providerDescriptorType">
        <xs:sequence>
          <xs:element name="AssertionConsumerServiceURL" maxOccurs="unbounded">
            <xs:complexType>
              <xs:simpleContent>
                <xs:extension base="xs:anyURI">
                  <xs:attribute name="id" type="xs:ID" use="required"/>
                  <xs:attribute name="isDefault" type="xs:boolean" default="false"/>
                </xs:extension>
              </xs:simpleContent>
            </xs:complexType>
          </xs:element>
          <xs:element name="AuthnRequestsSigned" type="xs:boolean"/>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="IDPDescriptorType">
    <xs:complexContent>
      <xs:extension base="providerDescriptorType">
        <xs:sequence>
          <xs:element name="SingleSignOnServiceURL" type="xs:anyURI"/>
          <xs:element name="SingleSignOnProtocolProfile" type="xs:anyURI" maxOccurs="unbounded"/>
          <xs:element name="AuthnServiceURL" type="xs:anyURI" minOccurs="0"/>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:element name="EntitiesDescriptor" type="entitiesDescriptorType"/>
  <xs:complexType name="entitiesDescriptorType">
    <xs:sequence>
      <xs:element ref="EntityDescriptor" minOccurs="2" maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="affiliationDescriptorType">
    <xs:sequence>
      <xs:element name="AffiliateMember" type="entityIDType" maxOccurs="unbounded"/>
      <xs:element ref="Extension" minOccurs="0"/>
      <xs:element name="KeyDescriptor" type="keyDescriptorType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element ref="ds:Signature" minOccurs="0"/>
    </xs:sequence>
    <!-- <xs:attribute name="affiliationID" type="entityIDType" use="required"/> -->
    <xs:attribute name="affiliationOwnerID" type="entityIDType" use="required"/>
    <xs:attribute ref="validUntil" use="optional"/>
    <xs:attribute ref="cacheDuration" use="optional"/>
    <xs:attribute name="id" type="xs:ID" use="optional"/>
  </xs:complexType>
</xs:schema>
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