<xsd:group name="MarginDetails.model"> <xsd:sequence> <xsd:element name="markToMarket" type="MarkToMarket" minOccurs="0" /> <xsd:element name="independentAmount" type="AggregatedIndependentAmount" minOccurs="0" /> <xsd:element name="marginTerm" type="MarginTerm" minOccurs="0" /> <xsd:element name="collateral" type="CollateralBalance" minOccurs="0" /> </xsd:sequence> </xsd:group>