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   <!-- The DMARC-aligned authentication result. -->
   <xs:simpleType name="DMARCResultType">
     <xs:restriction base="xs:string">
       <xs:enumeration value="pass"/>
       <xs:enumeration value="fail"/>
     </xs:restriction>
   </xs:simpleType>

   <!-- Reasons that may affect DMARC disposition or execution
        thereof. -->
   <xs:simpleType name="PolicyOverrideType">
     <xs:restriction base="xs:string">
       <xs:enumeration value="forwarded"/>
       <xs:enumeration value="sampled_out"/>
       <xs:enumeration value="trusted_forwarder"/>
       <xs:enumeration value="mailing_list"/>
       <xs:enumeration value="local_policy"/>
       <xs:enumeration value="other"/>
     </xs:restriction>
   </xs:simpleType>

   <!-- How do we allow report generators to include new
        classes of override reasons if they want to be more
        specific than "other"? -->
   <xs:complexType name="PolicyOverrideReason">
     <xs:all>
       <xs:element name="type" type="PolicyOverrideType"/>
       <xs:element name="comment" type="xs:string"
                   minOccurs="0"/>
     </xs:all>
   </xs:complexType>

   <!-- Taking into account everything else in the record,
        the results of applying DMARC. -->
   <xs:complexType name="PolicyEvaluatedType">
     <xs:sequence>
       <xs:element name="disposition" type="DispositionType"/>
       <xs:element name="dkim" type="DMARCResultType"/>
       <xs:element name="spf" type="DMARCResultType"/>
       <xs:element name="reason" type="PolicyOverrideReason"
                   minOccurs="0" maxOccurs="unbounded"/>
     </xs:sequence>
   </xs:complexType>

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