<xs:complexType name="ChannelStructure"> <xs:sequence> <xs:element name="PreferredChannel" minOccurs="0" maxOccurs="unbounded"> <xs:complexType> <xs:simpleContent> <xs:extension base="VotingChannelType"> <xs:attribute name="Fixed" type="YesNoType" use="optional" /> </xs:extension> </xs:simpleContent> </xs:complexType> </xs:element> <xs:element ref="Period" minOccurs="0" /> <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded" /> </xs:sequence> </xs:complexType>