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/usr/share/xml/shibboleth/shibboleth-2.0-afp.xsd is in shibboleth-sp2-common 2.5.3+dfsg-2.1build1.

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<?xml version="1.0" encoding="UTF-8"?>

<schema targetNamespace="urn:mace:shibboleth:2.0:afp"
    xmlns="http://www.w3.org/2001/XMLSchema"
    xmlns:afp="urn:mace:shibboleth:2.0:afp"
    xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
    elementFormDefault="qualified">

    <import namespace="http://www.w3.org/2000/09/xmldsig#" schemaLocation="classpath:/schema/xmldsig-core-schema.xsd" />

    <annotation>
        <documentation>Schema for the attribute filter policies.</documentation>
    </annotation>

    <element name="AttributeFilterPolicyGroup" type="afp:AttributeFilterPolicyGroupType">
        <annotation>
            <documentation>
                Root element of the attribute filter policy. Represents a named group of filter policies.
            </documentation>
        </annotation>
    </element>
    <complexType name="AttributeFilterPolicyGroupType">
        <complexContent>
            <extension base="afp:IdentityType">
                <sequence>
                    <element ref="afp:PolicyRequirementRule" minOccurs="0" maxOccurs="unbounded">
                        <annotation>
                            <documentation>
                                Defines a set of applications requirements that may be reused across multiple filter
                                policies.
                            </documentation>
                        </annotation>
                    </element>
                    <element ref="afp:PermitValueRule" minOccurs="0" maxOccurs="unbounded">
                        <annotation>
                            <documentation>
                                Defines a permit value rule that may be reused across multiple attribute rules.
                            </documentation>
                        </annotation>
                    </element>
                    <element ref="afp:DenyValueRule" minOccurs="0" maxOccurs="unbounded">
                        <annotation>
                            <documentation>
                                Defines a deny value rule that may be reused across multiple attribute rules.
                            </documentation>
                        </annotation>
                    </element>
                    <element ref="afp:AttributeRule" minOccurs="0" maxOccurs="unbounded">
                        <annotation>
                            <documentation>
                                Defines an attribute rule that may be reused across multiple filter policies.
                            </documentation>
                        </annotation>
                    </element>
                    <element ref="afp:AttributeFilterPolicy" minOccurs="0" maxOccurs="unbounded">
                        <annotation>
                            <documentation>
                                A policy that defines the set of attribute value filters that will be applied if its
                                application requirements are met.
                            </documentation>
                        </annotation>
                    </element>
                    <element ref="ds:Signature" minOccurs="0">
                        <annotation>
                            <documentation>
                                Digital signature for the policy. Policies that are fetched from an external source,
                                such as a federation site, should be signed.
                            </documentation>
                        </annotation>
                    </element>
                </sequence>
            </extension>
        </complexContent>
    </complexType>

    <element name="AttributeFilterPolicy" type="afp:AttributeFilterPolicyType">
        <annotation>
            <documentation>
                A policy that defines a set of attribute value filters rules that should be used if given requirements
                are met.
            </documentation>
        </annotation>
    </element>
    <complexType name="AttributeFilterPolicyType">
        <complexContent>
            <extension base="afp:IdentityType">
                <sequence>
                    <choice>
                        <element ref="afp:PolicyRequirementRule">
                            <annotation>
                                <documentation>
                                    A requirement that if met signals that this filter policy should be used.
                                </documentation>
                            </annotation>
                        </element>
                        <element name="PolicyRequirementRuleReference" type="afp:ReferenceType">
                            <annotation>
                                <documentation>
                                    Reference to a PolicyRequirement defined within this policy group or another.
                                </documentation>
                            </annotation>
                        </element>
                    </choice>
                    <choice minOccurs="0" maxOccurs="unbounded">
                        <element ref="afp:AttributeRule">
                            <annotation>
                                <documentation>
                                    A rule that describes how values of an attribute will be filtered.
                                </documentation>
                            </annotation>
                        </element>
                        <element name="AttributeRuleReference" type="afp:ReferenceType">
                            <annotation>
                                <documentation>
                                    Reference to a AttributeRule defined within this policy group or another.
                                </documentation>
                            </annotation>
                        </element>
                    </choice>
                </sequence>
            </extension>
        </complexContent>
    </complexType>

    <element name="AttributeRule" type="afp:AttributeRuleType">
        <annotation>
            <documentation>A rule that describes how values of an attribute will be filtered.</documentation>
        </annotation>
    </element>
    <complexType name="AttributeRuleType">
        <complexContent>
            <extension base="afp:IdentityType">
                <choice>
                    <choice minOccurs="0">
                        <element ref="afp:PermitValueRule" />
                        <element name="PermitValueRuleReference" type="afp:ReferenceType">
                            <annotation>
                                <documentation>
                                    Reference to a PermitValueRule defined within this policy group or another.
                                </documentation>
                            </annotation>
                        </element>
                    </choice>
                    <choice minOccurs="0">
                        <element ref="afp:DenyValueRule" />
                        <element name="DenyValueRuleReference" type="afp:ReferenceType">
                            <annotation>
                                <documentation>
                                    Reference to a DenyValueRule defined within this policy group or another.
                                </documentation>
                            </annotation>
                        </element>
                    </choice>
                </choice>
                <attribute name="attributeID" type="string" use="required">
                    <annotation>
                        <documentation>The ID of the attribute to which this rule applies.</documentation>
                    </annotation>
                </attribute>
            </extension>
        </complexContent>
    </complexType>

    <element name="PolicyRequirementRule" type="afp:MatchFunctorType">
        <annotation>
            <documentation>A requirement that if met signals that a filter policy should be used.</documentation>
        </annotation>
    </element>
    <element name="PermitValueRule" type="afp:MatchFunctorType">
        <annotation>
            <documentation>
                A filter for attribute values. If the filter evaluates to true the value is permitted to be released.
            </documentation>
        </annotation>
    </element>
    <element name="DenyValueRule" type="afp:MatchFunctorType">
        <annotation>
            <documentation>
                A filter for attribute values. If the filter evaluates to true the value is denied and may not be released.
            </documentation>
        </annotation>
    </element>
    <complexType name="MatchFunctorType" abstract="true">
        <complexContent>
            <extension base="afp:IdentityType" />
        </complexContent>
    </complexType>

    <complexType name="IdentityType">
        <attribute name="id" type="string">
            <annotation>
                <documentation>An ID, unique within the policy and component type.</documentation>
            </annotation>
        </attribute>
    </complexType>

    <complexType name="ReferenceType">
        <attribute name="ref" type="string">
            <annotation>
                <documentation>Used to reference a globally defined policy component.</documentation>
            </annotation>
        </attribute>
    </complexType>

</schema>