<xs:element name="Contest" maxOccurs="unbounded">
    <xs:complexType>
        <xs:sequence>
            <xs:element ref="ContestIdentifier" />
            <xs:element name="Description" type="MessagesStructure" minOccurs="0" />
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="Candidate" />
                <xs:element name="Affiliation">
                    <xs:complexType>
                        <xs:complexContent>
                            <xs:extension base="AffiliationStructure">
                                <xs:sequence>
                                    <xs:element ref="Candidate" minOccurs="0" maxOccurs="unbounded" />
                                    <xs:element ref="Proposer" minOccurs="0" maxOccurs="unbounded" />
                                    <xs:element ref="Endorsement" minOccurs="0" maxOccurs="unbounded" />
                                </xs:sequence>
                            </xs:extension>
                        </xs:complexContent>
                    </xs:complexType>
                </xs:element>
            </xs:choice>
            <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded" />
        </xs:sequence>
    </xs:complexType>
</xs:element>