it:SequenceNumeric (NIEM Wayfarer 5.1)

it:SequenceNumeric (niem-xs:nonNegativeInteger)

A number indicating the position in a sequence.

it:SequenceNumeric can be contained in any of these elements:

it:Consignment (of it:ConsignmentType)
A set of goods shipped or delivered under a consignment sale agreement.
it:ConsignmentItem (of it:ConsignmentItemType)
A sufficient identification of the nature of an item for customs, statistical or transport purposes.
it:CustomsGoodsItem (of it:CustomsGoodsItemType)
A data type that describes the value declared for purposes of those goods in a consignment.
it:GoodsShipment (of it:GoodsShipmentType)
A description of the goods being shipped
it:ShippingContainerCargoItem (of it:ConsignmentItemType)
A cargo item in a shipping container sufficient to identify it for customs, statistical or transport purposes.