Some of the RossettaNet PIPs are made up of 4 steps two actions and 2 signals. All 4 of these documents are tied together with a PIP Instance Identifier (PIP IID). Currently the RN solution requires that the PIP IID that is received on an initiating document from a TP be passed to the clients back end system and then returned from. The IBM solution has to have the ability to store the PIP IID in addition the the business document number (ex. PO#) and TP ID so that it can be retrieved for use on the confirmation document. allowing for the PIP integrity to be maintained.