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+Acquisitions Lineitem Order Identifiers
+=======================================
+
+Staff now have the ability to specify the identifier value to use for
+lineitems when communicating order information to vendors. This is
+particularly important when a lineitem has, for example, multiple ISBNs.
+Determining which ISBN is to act as the "order identifier" allows staff
+to provide the most accurate order information to vendors.
+
+Supported identifier types include ISBN, ISSN, and UPC. Order identifier
+values are relayed to vendors via EDI and print PO.
+
+Upgrade Notes
+=============
+
+Two new permissions are added for this feature:
+
+ * ACQ_SET_LINEITEM_IDENTIFIER
+ ** Allows staff to apply order identifiers to lineitems
+ * ACQ_ADD_LINEITEM_IDENTIFIER
+ ** Implies that new identifiers shall be added to linked bib records,
+ when a linkage exists.