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Purchase Order Acknowledgment
  • Specification
  • EDI Inspector
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X12 855 Purchase Order Acknowledgment

X12 Release 5010

This X12 Transaction Set contains the format and establishes the data contents of the Purchase Order Acknowledgment Transaction Set (855) for use within the context of an Electronic Data Interchange (EDI) environment. The transaction set can be used to provide for customary and established business and industry practice relative to a seller's acknowledgment of a buyer's purchase order.
This transaction set can also be used as notification of a vendor generated order. This usage advises a buyer that a vendor has or will ship merchandise as prearranged in their partnership.

Delimiters
  • ~ Segment
  • * Element
  • > Component
  • ^ Repetition
EDI sample
  • Sample 855
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Overview
ISA
-
Interchange Control Header
Max use 1
Required
GS
-
Functional Group Header
Max use 1
Required
heading
detail
PO1 Loop
summary
CTT Loop
SE
0300
Transaction Set Trailer
Max use 1
Required
GE
-
Functional Group Trailer
Max use 1
Required
IEA
-
Interchange Control Trailer
Max use 1
Required
ISA

Interchange Control Header

RequiredMax use 1

To start and identify an interchange of zero or more functional groups and interchange-related control segments

Example
ISA-01
I01
Authorization Information Qualifier
Required
Identifier (ID)

Code identifying the type of information in the Authorization Information

00
No Authorization Information Present (No Meaningful Information in I02)
ISA-02
I02
Authorization Information
Required
String (AN)
Min 10Max 10

Information used for additional identification or authorization of the interchange sender or the data in the interchange; the type of information is set by the Authorization Information Qualifier (I01)

ISA-03
I03
Security Information Qualifier
Required
Identifier (ID)

Code identifying the type of information in the Security Information

00
No Security Information Present (No Meaningful Information in I04)
ISA-04
I04
Security Information
Required
String (AN)
Min 10Max 10

This is used for identifying the security information about the interchange sender or the data in the interchange; the type of information is set by the Security Information Qualifier (I03)

ISA-05
I05
Interchange ID Qualifier
Required
Identifier (ID)
Min 2Max 2

Code indicating the system/method of code structure used to designate the sender or receiver ID element being qualified

Codes
ISA-06
I06
Interchange Sender ID
Required
String (AN)
Min 15Max 15

Identification code published by the sender for other parties to use as the receiver ID to route data to them; the sender always codes this value in the sender ID element

ISA-07
I05
Interchange ID Qualifier
Required
Identifier (ID)

Code indicating the system/method of code structure used to designate the sender or receiver ID element being qualified

08
UCC EDI Communications ID (Comm ID)
ISA-08
I07
Interchange Receiver ID
Required
String (AN)
Min 15Max 15

Identification code published by the receiver of the data; When sending, it is used by the sender as their sending ID, thus other parties sending to them will use this as a receiving ID to route data to them

ISA-09
I08
Interchange Date
Required
Date (DT)
YYMMDD format

Date of the interchange

ISA-10
I09
Interchange Time
Required
Time (TM)
HHMM format

Time of the interchange

ISA-11
I65
Repetition Separator
Required
String (AN)
Min 1Max 1

Type is not applicable; the repetition separator is a delimiter and not a data element; this field provides the delimiter used to separate repeated occurrences of a simple data element or a composite data structure; this value must be different than the data element separator, component element separator, and the segment terminator

^
Repetition Separator
ISA-12
I11
Interchange Control Version Number
Required
Identifier (ID)

Code specifying the version number of the interchange control segments

00501
Standards Approved for Publication by ASC X12 Procedures Review Board through October 2003
ISA-13
I12
Interchange Control Number
Required
Numeric (N0)
Min 9Max 9

A control number assigned by the interchange sender

ISA-14
I13
Acknowledgment Requested
Required
Identifier (ID)
Min 1Max 1

Code indicating sender's request for an interchange acknowledgment

0
No Interchange Acknowledgment Requested
1
Interchange Acknowledgment Requested (TA1)
ISA-15
I14
Interchange Usage Indicator
Required
Identifier (ID)
Min 1Max 1

Code indicating whether data enclosed by this interchange envelope is test, production or information

I
Information
P
Production Data
T
Test Data
ISA-16
I15
Component Element Separator
Required
String (AN)
Min 1Max 1

Type is not applicable; the component element separator is a delimiter and not a data element; this field provides the delimiter used to separate component data elements within a composite data structure; this value must be different than the data element separator and the segment terminator

>
Component Element Separator

Functional Group Header

RequiredMax use 1

To indicate the beginning of a functional group and to provide control information

Example
GS-01
479
Functional Identifier Code
Required
Identifier (ID)

Code identifying a group of application related transaction sets

PR
Purchase Order Acknowledgment (855)
GS-02
142
Application Sender's Code
Required
String (AN)
Min 2Max 15

Code identifying party sending transmission; codes agreed to by trading partners

GS-03
124
Application Receiver's Code
Required
String (AN)
Min 2Max 15

Code identifying party receiving transmission; codes agreed to by trading partners

GS-04
373
Date
Required
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD where CC represents the first two digits of the calendar year

GS-05
337
Time
Required
Time (TM)
HHMM, HHMMSS, HHMMSSD, or HHMMSSDD format

Time expressed in 24-hour clock time as follows: HHMM, or HHMMSS, or HHMMSSD, or HHMMSSDD, where H = hours (00-23), M = minutes (00-59), S = integer seconds (00-59) and DD = decimal seconds; decimal seconds are expressed as follows: D = tenths (0-9) and DD = hundredths (00-99)

GS-06
28
Group Control Number
Required
Numeric (N0)
Min 1Max 9

Assigned number originated and maintained by the sender

GS-07
455
Responsible Agency Code
Required
Identifier (ID)
Min 1Max 2

Code identifying the issuer of the standard; this code is used in conjunction with Data Element 480

T
Transportation Data Coordinating Committee (TDCC)
X
Accredited Standards Committee X12
GS-08
480
Version / Release / Industry Identifier Code
Required
String (AN)

Code indicating the version, release, subrelease, and industry identifier of the EDI standard being used, including the GS and GE segments; if code in DE455 in GS segment is X, then in DE 480 positions 1-3 are the version number; positions 4-6 are the release and subrelease, level of the version; and positions 7-12 are the industry or trade association identifiers (optionally assigned by user); if code in DE455 in GS segment is T, then other formats are allowed

005010
Standards Approved for Publication by ASC X12 Procedures Review Board through October 2003

Heading

ST
0100
Heading > ST

Transaction Set Header

RequiredMax use 1

To indicate the start of a transaction set and to assign a control number

Example
ST-01
143
Transaction Set Identifier Code
Required
Identifier (ID)

Code uniquely identifying a Transaction Set

  • The transaction set identifier (ST01) is used by the translation routines of the interchange partners to select the appropriate transaction set definition (e.g., 810 selects the Invoice Transaction Set).
855
Purchase Order Acknowledgment
ST-02
329
Transaction Set Control Number
Required
Numeric (N)
Min 4Max 9

Identifying control number that must be unique within the transaction set functional group assigned by the originator for a transaction set

BAK
0200
Heading > BAK

Beginning Segment for Purchase Order Acknowledgment

RequiredMax use 1

To indicate the beginning of the Purchase Order Acknowledgment Transaction Set and transmit identifying numbers and dates

Example
BAK-01
353
Transaction Set Purpose Code
Required
Identifier (ID)

Code identifying purpose of transaction set

00
Original
BAK-02
587
Acknowledgment Type
Required
Identifier (ID)

Code specifying the type of acknowledgment

Usage notes

BAK02 – We only support AC (Acknowledge with detail and change) and AD (Acknowledge with detail no change. No other codes are supported and both require that the PO1 be returned (with the correct data).

AC
Acknowledge - With Detail and Change
AD
Acknowledge - With Detail, No Change
BAK-03
324
Purchase Order Number
Required
String (AN)
Min 1Max 22

Identifying number for Purchase Order assigned by the orderer/purchaser

BAK-04
373
Date
Required
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD where CC represents the first two digits of the calendar year

  • BAK04 is the date assigned by the purchaser to purchase order.
Heading end

Detail

PO1 Loop
RequiredMax >1
PO1
0100
Detail > PO1 Loop > PO1

Baseline Item Data

RequiredMax use 1

To specify basic and most frequently used line item data

  • PO102 is required.
Example
If Unit or Basis for Measurement Code (PO1-03) is present, then Quantity (PO1-02) is required
If Basis of Unit Price Code (PO1-05) is present, then Unit Price (PO1-04) is required
If either Product/Service ID Qualifier (PO1-06) or Product/Service ID (PO1-07) is present, then the other is required
PO1-02
380
Quantity
Optional
Decimal number (R)
Min 1Max 15

Numeric value of quantity

  • PO102 is quantity ordered.
PO1-03
355
Unit or Basis for Measurement Code
Optional
Identifier (ID)

Code specifying the units in which a value is being expressed, or manner in which a measurement has been taken

EA
Each
PO1-04
212
Unit Price
Optional
Decimal number (R)
Min 1Max 15

Price per unit of product, service, commodity, etc.

PO1-05
639
Basis of Unit Price Code
Optional
Identifier (ID)

Code identifying the type of unit price for an item

NT
Net
PO1-06
235
Product/Service ID Qualifier
Optional
Identifier (ID)

Code identifying the type/source of the descriptive number used in Product/Service ID (234)

  • PO106 through PO125 provide for ten different product/service IDs per each item. For example: Case, Color, Drawing No., U.P.C. No., ISBN No., Model No., or SKU.
SK
Stock Keeping Unit (SKU)
UP
UCC - 12
PO1-07
234
Product/Service ID
Optional
String (AN)
Min 1Max 48

Identifying number for a product or service

CTP
0400
Detail > PO1 Loop > CTP

Pricing Information

OptionalMax use >1

To specify pricing information

Usage notes

CTP segment ONLY needs to be returned if there has been a price change.

Example
If either Quantity (CTP-04) or Composite Unit of Measure (CTP-05) is present, then the other is required
CTP-02
236
Price Identifier Code
Optional
Identifier (ID)

Code identifying pricing specification

RTL
Retail
CTP-03
212
Unit Price
Optional
Decimal number (R)
Min 1Max 15

Price per unit of product, service, commodity, etc.

  • See Figures Appendix for an example detailing the use of CTP03 and CTP04.
  • See Figures Appendix for an example detailing the use of CTP03, CTP04 and CTP07.
CTP-04
380
Quantity
Optional
Decimal number (R)
Min 1Max 15

Numeric value of quantity

CTP-05
C001
Composite Unit of Measure
Optional
To identify a composite unit of measure (See Figures Appendix for examples of use)
C001-01
355
Unit or Basis for Measurement Code
Required
Identifier (ID)

Code specifying the units in which a value is being expressed, or manner in which a measurement has been taken

EA
Each
ACK Loop
RequiredMax >1
ACK
2700
Detail > PO1 Loop > ACK Loop > ACK

Line Item Acknowledgment

RequiredMax use 1

To acknowledge the ordered quantities and specify the ready date for a specific line item

Example
If either Quantity (ACK-02) or Unit or Basis for Measurement Code (ACK-03) is present, then the other is required
If either Product/Service ID Qualifier (ACK-07) or Product/Service ID (ACK-08) is present, then the other is required
If Date/Time Qualifier (ACK-04) is present, then Date (ACK-05) is required
ACK-01
668
Line Item Status Code
Required
Identifier (ID)

Code specifying the action taken by the seller on a line item requested by the buyer

Usage notes

A minimum of the ACK01 must be returned with the appropriate code.

IA
Item Accepted
IB
Item Backordered
IC
Item Accepted - Changes Made
IP
Item Accepted - Price Changed
IQ
Item Accepted - Quantity Changed
IR
Item Rejected
IS
Item Accepted - Substitution Made
ACK-02
380
Quantity
Optional
Decimal number (R)
Min 1Max 15

Numeric value of quantity

Usage notes

ACK02 – only needs to be returned if the order quantity is being changed.

ACK-03
355
Unit or Basis for Measurement Code
Optional
Identifier (ID)

Code specifying the units in which a value is being expressed, or manner in which a measurement has been taken

EA
Each
ACK-04
374
Date/Time Qualifier
Optional
Identifier (ID)

Code specifying type of date or time, or both date and time

Usage notes

ACK04 and ACK05 only need to be returned if you are changing the ship date

068
Current Schedule Ship
ACK-05
373
Date
Optional
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD where CC represents the first two digits of the calendar year

Usage notes

ACK04 and ACK05 only need to be returned if you are changing the ship date

ACK-07
235
Product/Service ID Qualifier
Optional
Identifier (ID)

Code identifying the type/source of the descriptive number used in Product/Service ID (234)

Usage notes

ACK07 and ACK08 only need to be returned if you are substituting an item (and only if you have the buyer’s approval).

SK
Stock Keeping Unit (SKU)
UP
UCC - 12
ACK-08
234
Product/Service ID
Optional
String (AN)
Min 1Max 48

Identifying number for a product or service

Usage notes

ACK07 and ACK08 only need to be returned if you are substituting an item (and only if you have the buyer’s approval).

DTM
2800
Detail > PO1 Loop > ACK Loop > DTM

Date/Time Reference

OptionalMax use 1

To specify pertinent dates and times

Usage notes

DTM segment only needs to be returned if you are changing the delivery date.

Example
DTM-01
374
Date/Time Qualifier
Required
Identifier (ID)

Code specifying type of date or time, or both date and time

067
Current Schedule Delivery
DTM-02
373
Date
Required
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD where CC represents the first two digits of the calendar year

ACK Loop end
PO1 Loop end
Detail end

Summary

CTT Loop
OptionalMax >1
CTT
0100
Summary > CTT Loop > CTT

Transaction Totals

RequiredMax use 1

To transmit a hash total for a specific element in the transaction set

  • The number of line items (CTT01) is the accumulation of the number of PO1 segments. If used, hash total (CTT02) is the sum of the value of quantities ordered (PO102) for each PO1 segment.
Example
CTT-01
354
Number of Line Items
Required
Numeric (N0)
Min 1Max 6

Total number of line items in the transaction set

CTT Loop end
SE
0300
Summary > SE

Transaction Set Trailer

RequiredMax use 1

To indicate the end of the transaction set and provide the count of the transmitted segments (including the beginning (ST) and ending (SE) segments)

Example
SE-01
96
Number of Included Segments
Required
Numeric (N0)
Min 1Max 10

Total number of segments included in a transaction set including ST and SE segments

SE-02
329
Transaction Set Control Number
Required
Numeric (N)
Min 4Max 9

Identifying control number that must be unique within the transaction set functional group assigned by the originator for a transaction set

Summary end

Functional Group Trailer

RequiredMax use 1

To indicate the end of a functional group and to provide control information

Example
GE-01
97
Number of Transaction Sets Included
Required
Numeric (N0)
Min 1Max 6

Total number of transaction sets included in the functional group or interchange (transmission) group terminated by the trailer containing this data element

GE-02
28
Group Control Number
Required
Numeric (N0)
Min 1Max 9

Assigned number originated and maintained by the sender

Interchange Control Trailer

RequiredMax use 1

To define the end of an interchange of zero or more functional groups and interchange-related control segments

Example
IEA-01
I16
Number of Included Functional Groups
Required
Numeric (N0)
Min 1Max 5

A count of the number of functional groups included in an interchange

IEA-02
I12
Interchange Control Number
Required
Numeric (N0)
Min 9Max 9

A control number assigned by the interchange sender

EDI Samples

Sample 855

ISA*00* *00* *ZZ*SENDER *ZZ*RECEIVER *231031*0050*^*00501*000000001*0*T*>
GS*PR*SENDERGS*RECEIVERGS*20231031*005030*000000001*X*005010
ST*855*41050001
BAK*00*AD*0999999*20230323
PO1**35*EA*53.00**UP*111111111111
CTP**RTL*118.00*35*EA
ACK*IA*35*EA
PO1**35*EA*53.00**UP*111111111112
CTP**RTL*118.00*35*EA
ACK*IA*35*EA
PO1**45*EA*53.00**UP*111111111113
CTP**RTL*118.00*45*EA
ACK*IA*45*EA
PO1**45*EA*53.00**UP*111111111114
CTP**RTL*118.00*45*EA
ACK*IA*45*EA
PO1**45*EA*53.00**UP*111111111115
CTP**RTL*118.00*45*EA
ACK*IA*45*EA
PO1**35*EA*53.00**UP*111111111116
CTP**RTL*118.00*35*EA
ACK*IA*35*EA
CTT*6
SE*22*41050001
GE*1*000000001
IEA*1*000000001

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