Segment: REF Reference Identification Position: 150 Loop: HL Mandatory Level: Detail Usage: Optional Max Use: >1 Purpose: To specify identifying information Syntax Notes: 1 At least one of REF02 or REF03 is required.   2 If either C04003 or C04004 is present, then the other is required.   3 If either C04005 or C04006 is present, then the other is required. Semantic Notes: 1 REF04 contains data relating to the value cited in REF02. Comments: Notes:   Example:  REF*BM*Bill of Lading Number!  REF*CN*Pro number!      Data Element Summary                                                          Ref. Data   Des. Element Name Attributes M REF01 128 Reference Identification Qualifier M ID 2/3   Code qualifying the Reference Identification       BM    Bill of Lading Number   CN    Carrier's Reference Number (PRO/Invoice)   M REF02 127 Reference Identification M AN 1/30   Reference information as defined for a particular Transaction Set or as specified by the Reference Identification Qualifier     When REF01 = BM; Bill of Lading Number  When REF01 = CN; PRO/Invoice Number   Previous Up Next                   856I4010 (004010) February 18, 2000