`RentIncomeMember` MUST be equal to the summation of the underlying children members. | {if (not(xff:has-fallback-value(xs:QName('varArc_SpecificationOfTheRentalIncomeDaebHousingDvi_PrtFST1SumOfMembersOnAbstract1_Abstract_SumOfMembersOnAbstract')))) then ((for $v in $varArc_SpecificationOfTheRentalIncomeDaebHousingDvi_PrtFST1SumOfMembersOnAbstract1_Abstract_SumOfMembersOnAbstract return concat("name:'",$v/name(),"', value:'",$v,"', @contextRef:'",$v/@contextRef,"', @unitRef:'",$v/@unitRef,"' | "))) else ''}{if (not(xff:has-fallback-value(xs:QName('varArc_SpecificationOfTheRentalIncomeDaebHousingDvi_PrtFST1SumOfMembersOnAbstract1_Abstract_ChildrenMember')))) then ((for $v in $varArc_SpecificationOfTheRentalIncomeDaebHousingDvi_PrtFST1SumOfMembersOnAbstract1_Abstract_ChildrenMember return concat("name:'",$v/name(),"', value:'",$v,"', @contextRef:'",$v/@contextRef,"', @unitRef:'",$v/@unitRef,"' | "))) else ''} `RentalIncome` MUST exist at least once. `RentalIncome` MUST exist at least once. `RentalIncome` MUST exist at least once. `RentalIncome` MUST exist at least once. `RentalIncome` MUST exist at least once. `RentalIncome` MUST exist at least once. `RentalIncome` MUST exist at least once.