<xsd:complexType name="ELD"> <xsd:sequence> <xsd:element ref="ELD.1" minOccurs="0" maxOccurs="1" /> <xsd:element ref="ELD.2" minOccurs="0" maxOccurs="1" /> <xsd:element ref="ELD.3" minOccurs="0" maxOccurs="1" /> <xsd:element ref="ELD.4" minOccurs="0" maxOccurs="1" /> </xsd:sequence> </xsd:complexType>