855 Purchase Order Acknowledgment (005050)
This is the standard X12 005050 spec, with 19 loops and 155 segment positions, as OpenEDI JSON, an ediFabric C# template and an ediFabric Native model. To change it for a trading partner, customize it in the EDI Spec Builder.
Use the 855 spec in your code
ediFabric .NET
Add the C# template and its common files to your project, or reference the template NuGet package, and read 855 files into TS855 objects. See ediFabric .NET.
ediFabric Native
Map version 005050 to the Native model with set_map, then parse 855 files to JSON from Python, Java, C or C#. See Convert between EDI and JSON.
OpenEDI
Select Customize in Spec Builder to copy the spec under your own name, change it for your partner, and parse files against it in EdiNation, ediFabric Native or ediFabric Cloud. Read about OpenEDI.
Generate 855 classes in Python, Java, Node.js, Go, Rust or C
ediFabric Native returns each 855 as JSON, with the property names of the OpenEDI schema. To work with that JSON as typed objects, generate classes from the OpenEDI file in your language and deserialize the JSON into TS855. Serialize the objects back to JSON to build EDI with ediFabric Native. The classes keep the loops, segments, lengths and code lists, but not the EDI data formats, so validate files with ediFabric Native. Read more in Generate a class from OpenEDI.
Python: datamodel-code-generator. Node.js: openapi-typescript. Java, Go, Rust and C: OpenAPI Generator.
For a sample file, the same data as JSON, and code to parse, validate and generate the 855, see the 855 transaction guide.
855 structure
Loops and segments of the standard 855, with their usage and maximum repeats.
| ID | Name | Usage | Max use |
|---|---|---|---|
| ST | Transaction Set Header | Optional | 1 |
| BAK | Beginning Segment for Purchase Order Acknowledgment | Mandatory | 1 |
| CUR | Currency | Optional | 1 |
| REF | Reference Information | Optional | >1 |
| PER | Administrative Communications Contact | Optional | 3 |
| TAX | Tax Reference | Optional | >1 |
| FOB | F.O.B. Related Instructions | Optional | >1 |
| CTP | Pricing Information | Optional | >1 |
| PAM | Period Amount | Optional | 10 |
| CSH | Sales Requirements | Optional | 1 |
| Loop SAC | Service, Promotion, Allowance, or Charge Information | Optional | 25 |
| SAC | Service, Promotion, Allowance, or Charge Information | Mandatory | 1 |
| CUR | Currency | Optional | 1 |
| ITD | Terms of Sale/Deferred Terms of Sale | Optional | >1 |
| DIS | Discount Detail | Optional | 20 |
| INC | Installment Information | Optional | 1 |
| DTM | Date/Time Reference | Optional | 10 |
| LDT | Lead Time | Optional | 12 |
| LIN | Item Identification | Optional | 5 |
| SI | Service Characteristic Identification | Optional | >1 |
| PID | Product/Item Description | Optional | 200 |
| MEA | Measurements | Optional | 40 |
| PWK | Paperwork | Optional | 25 |
| PKG | Marking, Packaging, Loading | Optional | 25 |
| TD1 | Carrier Details (Quantity and Weight) | Optional | 2 |
| TD5 | Carrier Details (Routing Sequence/Transit Time) | Optional | 12 |
| TD3 | Carrier Details (Equipment) | Optional | 12 |
| TD4 | Carrier Details (Special Handling, or Hazardous Materials, or Both) | Optional | 5 |
| MAN | Marks and Numbers Information | Optional | 10 |
| TXI | Tax Information | Optional | >1 |
| CTB | Restrictions/Conditions | Optional | >1 |
| Loop N9 | Extended Reference Information | Optional | 1000 |
| N9 | Extended Reference Information | Mandatory | 1 |
| DTM | Date/Time Reference | Optional | >1 |
| MTX | Text | Optional | >1 |
| PWK | Paperwork | Optional | >1 |
| EFI | Electronic Format Identification | Optional | >1 |
| Loop N1 | Party Identification | Optional | 200 |
| N1 | Party Identification | Mandatory | 1 |
| N2 | Additional Name Information | Optional | 2 |
| IN2 | Individual Name Structure Components | Optional | >1 |
| N3 | Party Location | Optional | 2 |
| N4 | Geographic Location | Optional | 1 |
| NX2 | Location ID Component | Optional | >1 |
| REF | Reference Information | Optional | 12 |
| PER | Administrative Communications Contact | Optional | >1 |
| SI | Service Characteristic Identification | Optional | >1 |
| FOB | F.O.B. Related Instructions | Optional | 1 |
| TD1 | Carrier Details (Quantity and Weight) | Optional | 2 |
| TD5 | Carrier Details (Routing Sequence/Transit Time) | Optional | 12 |
| TD3 | Carrier Details (Equipment) | Optional | 12 |
| TD4 | Carrier Details (Special Handling, or Hazardous Materials, or Both) | Optional | 5 |
| PKG | Marking, Packaging, Loading | Optional | 25 |
| MTX | Text | Optional | >1 |
| Loop ADV | Advertising Demographic Information | Optional | >1 |
| ADV | Advertising Demographic Information | Mandatory | 1 |
| DTM | Date/Time Reference | Optional | >1 |
| MTX | Text | Optional | >1 |
| Loop PO1 | Baseline Item Data | Optional | 100000 |
| PO1 | Baseline Item Data | Mandatory | 1 |
| LIN | Item Identification | Optional | >1 |
| SI | Service Characteristic Identification | Optional | >1 |
| CUR | Currency | Optional | 1 |
| PO3 | Additional Item Detail | Optional | 25 |
| CTP | Pricing Information | Optional | >1 |
| PAM | Period Amount | Optional | 10 |
| MEA | Measurements | Optional | 40 |
| Loop PID | Product/Item Description | Optional | 1000 |
| PID | Product/Item Description | Mandatory | 1 |
| MEA | Measurements | Optional | 10 |
| PWK | Paperwork | Optional | 25 |
| PO4 | Item Physical Details | Optional | >1 |
| REF | Reference Information | Optional | >1 |
| PER | Administrative Communications Contact | Optional | 3 |
| Loop SAC | Service, Promotion, Allowance, or Charge Information | Optional | 25 |
| SAC | Service, Promotion, Allowance, or Charge Information | Mandatory | 1 |
| CUR | Currency | Optional | 1 |
| IT8 | Conditions of Sale | Optional | 1 |
| CSH | Sales Requirements | Optional | >1 |
| ITD | Terms of Sale/Deferred Terms of Sale | Optional | >1 |
| DIS | Discount Detail | Optional | 20 |
| INC | Installment Information | Optional | 1 |
| TAX | Tax Reference | Optional | >1 |
| FOB | F.O.B. Related Instructions | Optional | >1 |
| SDQ | Destination Quantity | Optional | 500 |
| DTM | Date/Time Reference | Optional | 10 |
| LDT | Lead Time | Optional | 12 |
| TD1 | Carrier Details (Quantity and Weight) | Optional | 1 |
| TD5 | Carrier Details (Routing Sequence/Transit Time) | Optional | 12 |
| TD3 | Carrier Details (Equipment) | Optional | 12 |
| TD4 | Carrier Details (Special Handling, or Hazardous Materials, or Both) | Optional | 5 |
| Loop ACK | Line Item Acknowledgment | Optional | 104 |
| ACK | Line Item Acknowledgment | Mandatory | 1 |
| DTM | Date/Time Reference | Optional | 1 |
| MAN | Marks and Numbers Information | Optional | 10 |
| AMT | Monetary Amount Information | Optional | 1 |
| CTB | Restrictions/Conditions | Optional | >1 |
| TXI | Tax Information | Optional | >1 |
| Loop QTY | Quantity Information | Optional | >1 |
| QTY | Quantity Information | Mandatory | 1 |
| SI | Service Characteristic Identification | Optional | >1 |
| Loop PKG | Marking, Packaging, Loading | Optional | 200 |
| PKG | Marking, Packaging, Loading | Mandatory | 1 |
| MEA | Measurements | Optional | >1 |
| Loop SCH | Line Item Schedule | Optional | 200 |
| SCH | Line Item Schedule | Mandatory | 1 |
| TD1 | Carrier Details (Quantity and Weight) | Optional | 2 |
| TD5 | Carrier Details (Routing Sequence/Transit Time) | Optional | 12 |
| TD3 | Carrier Details (Equipment) | Optional | 12 |
| TD4 | Carrier Details (Special Handling, or Hazardous Materials, or Both) | Optional | 5 |
| REF | Reference Information | Optional | >1 |
| Loop N9 | Extended Reference Information | Optional | 1000 |
| N9 | Extended Reference Information | Mandatory | 1 |
| DTM | Date/Time Reference | Optional | >1 |
| MTX | Text | Optional | >1 |
| PWK | Paperwork | Optional | >1 |
| EFI | Electronic Format Identification | Optional | >1 |
| Loop N1 | Party Identification | Optional | 200 |
| N1 | Party Identification | Mandatory | 1 |
| N2 | Additional Name Information | Optional | 2 |
| IN2 | Individual Name Structure Components | Optional | >1 |
| N3 | Party Location | Optional | 2 |
| N4 | Geographic Location | Optional | 1 |
| NX2 | Location ID Component | Optional | >1 |
| REF | Reference Information | Optional | 12 |
| PER | Administrative Communications Contact | Optional | 3 |
| SI | Service Characteristic Identification | Optional | >1 |
| DTM | Date/Time Reference | Optional | 1 |
| FOB | F.O.B. Related Instructions | Optional | 1 |
| SCH | Line Item Schedule | Optional | 200 |
| TD1 | Carrier Details (Quantity and Weight) | Optional | 2 |
| TD5 | Carrier Details (Routing Sequence/Transit Time) | Optional | 12 |
| TD3 | Carrier Details (Equipment) | Optional | 12 |
| TD4 | Carrier Details (Special Handling, or Hazardous Materials, or Both) | Optional | 5 |
| QTY | Quantity Information | Optional | >1 |
| PKG | Marking, Packaging, Loading | Optional | 25 |
| Loop SLN | Subline Item Detail | Optional | 1000 |
| SLN | Subline Item Detail | Mandatory | 1 |
| MTX | Text | Optional | >1 |
| SI | Service Characteristic Identification | Optional | >1 |
| PID | Product/Item Description | Optional | 1000 |
| PO3 | Additional Item Detail | Optional | 25 |
| MEA | Measurements | Optional | >1 |
| CTP | Pricing Information | Optional | 25 |
| PAM | Period Amount | Optional | 10 |
| ACK | Line Item Acknowledgment | Optional | 104 |
| Loop SAC | Service, Promotion, Allowance, or Charge Information | Optional | 10 |
| SAC | Service, Promotion, Allowance, or Charge Information | Mandatory | 1 |
| CUR | Currency | Optional | 1 |
| DTM | Date/Time Reference | Optional | 10 |
| PO4 | Item Physical Details | Optional | 1 |
| TAX | Tax Reference | Optional | 3 |
| ADV | Advertising Demographic Information | Optional | >1 |
| Loop QTY | Quantity Information | Optional | >1 |
| QTY | Quantity Information | Mandatory | 1 |
| SI | Service Characteristic Identification | Optional | >1 |
| Loop N9 | Extended Reference Information | Optional | >1 |
| N9 | Extended Reference Information | Mandatory | 1 |
| DTM | Date/Time Reference | Optional | >1 |
| MTX | Text | Optional | >1 |
| Loop N1 | Party Identification | Optional | 10 |
| N1 | Party Identification | Mandatory | 1 |
| N2 | Additional Name Information | Optional | 2 |
| IN2 | Individual Name Structure Components | Optional | >1 |
| N3 | Party Location | Optional | 2 |
| N4 | Geographic Location | Optional | 1 |
| NX2 | Location ID Component | Optional | >1 |
| REF | Reference Information | Optional | 12 |
| PER | Administrative Communications Contact | Optional | 3 |
| SI | Service Characteristic Identification | Optional | >1 |
| Loop CTT | Transaction Totals | Optional | 1 |
| CTT | Transaction Totals | Mandatory | 1 |
| AMT | Monetary Amount Information | Optional | 1 |
| SE | Transaction Set Trailer | Optional | 1 |