用于解析EDI的PL / SQL（X12，NCPDP，HL7）

I have some EDI messages (X12, HL7, etc ...) stored in an Oracle database. I sometimes want to pull out individual fields (e.g. ISA-03). Currently, I have some really ugly sql. I'd like to create a PL/SQL package to make it easier and was wondering if anybody had already done this.I have some EDI messages (X12, HL7, etc ...) st