Bob comments are very valid.
A shipment may have many related Order Releases.
The refnum (or Remark) you could use as mentioned - could be populated with all the related ORs concatenated and seperated by a comma.
I have also done this where the value is either the OR XID or MANY depending on whether there are one or more related ORs.
Also - you can see related Order Releases using the tree (the +) by drill into the particular shipment.
Cheers
Gary
