<element name="DocumentReference">
<annotation>
<documentation>Structure which contains information that links this request to a reference document,
i.e., contract, agreement, etc.
</documentation>
</annotation>
<complexType>
<sequence>
<element ref="pidx:DocumentIdentifier" />
<element ref="pidx:ReferenceItem" minOccurs="0" />
<element ref="pidx:ReferenceInformation" minOccurs="0" />
<element ref="pidx:DocumentDate" minOccurs="0" />
</sequence>
<attribute name="referenceType" type="pidx:ReferenceType" use="required">
<annotation>
<documentation>Identifies what kind of document is being referenced.</documentation>
</annotation>
</attribute>
<attribute name="definitionOfOther" type="string" use="optional">
<annotation>
<documentation>Identifies what "Other" is if chosen from an attribute enumeration list</documentation>
</annotation>
</attribute>
</complexType>
</element>
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