Appendix 2.1 - Document Identifier Codes

AP2.1.1. Document Identifier Codes (DIC) (located in record position (rp) 1-3 of transactions) provide a means of identifying a given product (for example, a requisition, referral action, status transaction, follow-up, or cancellation) to the system to which it pertains and further identify such data as to the intended purpose, usage, and operation dictated. ................
................