Title: UBL Issues

The following issues identified in the NES profiling exercise warrant discussion and resolution by the PSC at the telecon on 21st August.

* Invoice Line

* Item Instance is on Invoice Line; consider whether Item Instance should only be used in the context of Item itself

* Period

* Duration measure cannot be used in UBL: ISO 8601 is alpha and the UBL data type is a decimal

* Document Reference

* Why is copy indictor in Document Reference ?

* Supplier Party

* NES observation

* SupplierParty.Shipping_Contact should be SupplierParty.Despatch_Party * SupplierParty.Order_Contact should be SupplierParty.Seller_Contact

* Personal observation

* I think all three contact ASBIES should be removed from SupplierParty to make it the same in structure as CustomerParty; * if Contact is required, it can be reached through the Party ASBIE

* Payment Means

* PaymentMeansCode description is wrong; it should be "The Payment Means expressed as a code".

* Item

* Item Specification Document Reference is 0..1; should be 0..n

* Item Instance

* Product Trace ID should be optional

* Related Item

* RelatedItemID should be the ID for the related item (?); the definition states "an ID for the relationship"

* Lot Identification

* the association to Lot Identification should should be in Item Instance, not in Item

* Commodity classification

* there should be an ASBIE to Classification Scheme inside Commodity Classification (?)