<xs:element name="InputFormat" maxOccurs="unbounded"> <xs:complexType> <xs:sequence> <xs:choice> <xs:element name="FormatURL" type="xs:anyURI" /> <xs:element name="ObjectType" type="xs:NMTOKEN" /> </xs:choice> <xs:element name="Description" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:element>