[SCH-EUSR-04] The maximum of all subsets of ReceivingEndUsers MUST be lower or equal to FullSet/ReceivingEndUsers
SCH-EUSR-04
/eusr:EndUserStatisticsReport
$empty or max(eusr:Subset/eusr:ReceivingEndUsers) le xs:integer(eusr:FullSet/eusr:ReceivingEndUsers)