Integrated Supply Network
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Purchase Order Acknowledgment
  • Specification
  • EDI Inspector
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X12 855 Purchase Order Acknowledgment

X12 Release 4010

This Draft Standard for Trial Use 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
EDI samples
  • None included
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Overview
ISA
-
Interchange Control Header
Max use 1
Required
GS
-
Functional Group Header
Max use 1
Required
heading
ST
010
Transaction Set Header
Max use 1
Required
BAK
020
Beginning Segment for Purchase Order Acknowledgment
Max use 1
Required
REF
050
Reference Identification
Max use 1
Required
PER
060
Administrative Communications Contact
Max use 3
Optional
DTM
150
Date/Time Reference
Max use 10
Optional
N9 Loop
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 to identify 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 to identify 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

Qualifier to designate 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)
Min 2Max 2

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

Codes
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
I10
Interchange Control Standards Identifier
Required
Identifier (ID)

Code to identify the agency responsible for the control standard used by the message that is enclosed by the interchange header and trailer

U
U.S. EDI Community of ASC X12, TDCC, and UCS
ISA-12
I11
Interchange Control Version Number
Required
Identifier (ID)

This version number covers the interchange control segments

00401
Draft Standards for Trial Use Approved for Publication by ASC X12 Procedures Review Board through October 1997
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 sent by the sender to request an interchange acknowledgment (TA1)

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

Code to indicate 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 Acknowledgement (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

Required
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD

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 used in conjunction with Data Element 480 to identify the issuer of the standard

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

004010
Draft Standards Approved for Publication by ASC X12 Procedures Review Board through October 1997

Heading

ST
010
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) 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
020
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

Usage notes

Qualifier 05 indicates that the supplier is making a correction to a previously sent 855. However it is acceptable for the supplier to provide qualifier 00 for the initial acknowledgment as well as any followup communications. Both qualifiers will be treated as an independent communication.

00
Original
05
Replace
BAK-02
587
Acknowledgment Type
Required
Identifier (ID)

Code specifying the type of acknowledgment

AC
Acknowledge - With Detail and Change

Vendors are required to provide all of the items on the order with the individual item status.

AT
Accepted

All Items on the order are accepted as is with no changes and the supplier will ship and invoices as requested/indicated on the order (850).

RJ
Rejected - No Detail

Entire order is being rejected. Vendors are required to send an explanation of why the rejection in the N9/MSG segments.

BAK-03
324
Purchase Order Number
Required
String (AN)
Min 1Max 22

Identifying number for Purchase Order assigned by the orderer/purchaser

Required
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD

  • BAK04 is the date assigned by the purchaser to purchase order.
BAK-08
127
Reference Identification
Optional
String (AN)
Min 1Max 30

Reference information as defined for a particular Transaction Set or as specified by the Reference Identification Qualifier

  • BAK08 is the seller's order number.
Usage notes

This can be the vendor defined reference number.

Optional
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD

  • BAK09 is the date assigned by the sender to the acknowledgment.
REF
050
Heading > REF

Reference Identification

RequiredMax use >1

To specify identifying information

Example
REF-01
128
Reference Identification Qualifier
Required
Identifier (ID)

Code qualifying the Reference Identification

IA
Internal Vendor Number
REF-02
127
Reference Identification
Required
String (AN)
Min 1Max 30

Reference information as defined for a particular Transaction Set or as specified by the Reference Identification Qualifier

PER
060
Heading > PER

Administrative Communications Contact

OptionalMax use 3

To identify a person or office to whom administrative communications should be directed

Example
If either Communication Number Qualifier (PER-03) or Communication Number (PER-04) is present, then the other is required
If either Communication Number Qualifier (PER-05) or Communication Number (PER-06) is present, then the other is required
If either Communication Number Qualifier (PER-07) or Communication Number (PER-08) is present, then the other is required
PER-01
366
Contact Function Code
Required
Identifier (ID)

Code identifying the major duty or responsibility of the person or group named

BD
Buyer Name or Department
CN
General Contact
Required
String (AN)
Min 1Max 60

Free-form name

PER-03
365
Communication Number Qualifier
Optional
Identifier (ID)

Code identifying the type of communication number

TE
Telephone
PER-04
364
Communication Number
Optional
String (AN)
Min 1Max 80

Complete communications number including country or area code when applicable

PER-05
365
Communication Number Qualifier
Optional
Identifier (ID)

Code identifying the type of communication number

FX
Facsimile
PER-06
364
Communication Number
Optional
String (AN)
Min 1Max 80

Complete communications number including country or area code when applicable

PER-07
365
Communication Number Qualifier
Optional
Identifier (ID)

Code identifying the type of communication number

EM
Electronic Mail
PER-08
364
Communication Number
Optional
String (AN)
Min 1Max 80

Complete communications number including country or area code when applicable

DTM
150
Heading > DTM

Date/Time Reference

OptionalMax use 10

To specify pertinent dates and times

Example
If Time Code (DTM-04) is present, then Time (DTM-03) is required
DTM-01
374
Date/Time Qualifier
Required
Identifier (ID)

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

068
Current Schedule Ship
Required
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD

Optional
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)

DTM-04
623
Time Code
Optional
Identifier (ID)
Min 2Max 2

Code identifying the time. In accordance with International Standards Organization standard 8601, time can be specified by a + or - and an indication in hours in relation to Universal Time Coordinate (UTC) time; since + is a restricted character, + and - are substituted by P and M in the codes that follow

N9 Loop
OptionalMax >1
Usage notes

Required if BAK02 = RJ or ACK01 = IR.

N9
280
Heading > N9 Loop > N9

Reference Identification

RequiredMax use 1

To transmit identifying information as specified by the Reference Identification Qualifier

Example
N9-01
128
Reference Identification Qualifier
Required
Identifier (ID)

Code qualifying the Reference Identification

ZZ
Mutually Defined
N9-03
369
Free-form Description
Required
String (AN)
Min 1Max 45

Free-form descriptive text

MSG
290
Heading > N9 Loop > MSG

Message Text

RequiredMax use 1000

To provide a free-form format that allows the transmission of text information

Example
MSG-01
933
Free-Form Message Text
Required
String (AN)
Min 1Max 264

Free-form message text

N9 Loop end
N1 Loop
OptionalMax >1
N1
300
Heading > N1 Loop > N1

Name

RequiredMax use 1

To identify a party by type of organization, name, and code

Example
N1-01
98
Entity Identifier Code
Required
Identifier (ID)

Code identifying an organizational entity, a physical location, property or an individual

ST
Ship To
Required
String (AN)
Min 1Max 60

Free-form name

N1-03
66
Identification Code Qualifier
Required
Identifier (ID)

Code designating the system/method of code structure used for Identification Code (67)

54
Warehouse

Used for ISN facility locations.

ZZ
Mutually Defined

Used for ISN Customer Drop Ship orders.

N1-04
67
Identification Code
Required
String (AN)
Min 2Max 80

Code identifying a party or other code

  • This segment, used alone, provides the most efficient method of providing organizational identification. To obtain this efficiency the "ID Code" (N104) must provide a key to the table maintained by the transaction processing party.
N3
320
Heading > N1 Loop > N3

Address Information

RequiredMax use 2

To specify the location of the named party

Example
N3-01
166
Address Information
Required
String (AN)
Min 1Max 55

Address information

N3-02
166
Address Information
Optional
String (AN)
Min 1Max 55

Address information

N4
330
Heading > N1 Loop > N4

Geographic Location

RequiredMax use 1

To specify the geographic place of the named party

Example
N4-01
19
City Name
Required
String (AN)
Min 2Max 30

Free-form text for city name

  • A combination of either N401 through N404, or N405 and N406 may be adequate to specify a location.
N4-02
156
State or Province Code
Required
Identifier (ID)
Min 2Max 2

Code (Standard State/Province) as defined by appropriate government agency

  • N402 is required only if city name (N401) is in the U.S. or Canada.
N4-03
116
Postal Code
Required
Identifier (ID)
Min 3Max 15

Code defining international postal zone code excluding punctuation and blanks (zip code for United States)

N4-04
26
Country Code
Optional
Identifier (ID)
Min 2Max 3

Code identifying the country

N1 Loop end
Heading end

Detail

PO1 Loop
OptionalMax >1
Usage notes

All items that were on the order must be included in the POA when BAK02 = AC and must indicate that Items status in the ACK segment. Vendors can send items when BAK02 = AT but is not required. When BAK02 = RJ,
items are not expected to be included in the 855.

PO1
010
Detail > PO1 Loop > PO1

Baseline Item Data

RequiredMax use 1

To specify basic and most frequently used line item data

  • PO102 is required.
Example
PO1-01
350
Assigned Identification
Required
String (AN)
Min 1Max 20

Alphanumeric characters assigned for differentiation within a transaction set

  • PO101 is the line item identification.
Usage notes

Must match ISN PO line number from the 850.

PO1-02
330
Quantity Ordered
Required
Decimal number (R)
Min 1Max 15

Quantity ordered

Usage notes

Used to confirm order quantity. If backordering an item, indicate the applicable quantity and date in the ACK segment.

PO1-03
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

Usage notes

Used to confirm UOM from PO.

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

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

Usage notes

Used to confirm PO cost. If the cost is incorrect on the order, vendors are to provide the requested/correct cost in the CTP segment.

PO1-06
235
Product/Service ID Qualifier
Required
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.
CB
Buyer's Catalog Number
PO1-07
234
Product/Service ID
Required
String (AN)
Min 1Max 48

Identifying number for a product or service

PO1-08
235
Product/Service ID Qualifier
Required
Identifier (ID)

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

VP
Vendor's (Seller's) Part Number
PO1-09
234
Product/Service ID
Required
String (AN)
Min 1Max 48

Identifying number for a product or service

CTP
040
Detail > PO1 Loop > CTP

Pricing Information

OptionalMax use >1

To specify pricing information

Example
CTP-01
687
Class of Trade Code
Optional
Identifier (ID)

Code indicating class of trade

AS
Seller
CTP-02
236
Price Identifier Code
Optional
Identifier (ID)

Code identifying pricing specification

CHG
Changed Price
CTP-03
212
Unit Price
Required
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.
PID Loop
OptionalMax >1
PID
050
Detail > PO1 Loop > PID Loop > PID

Product/Item Description

RequiredMax use 1

To describe a product or process in coded or free-form format

Example
PID-01
349
Item Description Type
Required
Identifier (ID)

Code indicating the format of a description

  • If PID01 equals "F", then PID05 is used. If PID01 equals "S", then PID04 is used. If PID01 equals "X", then both PID04 and PID05 are used.
F
Free-form
PID-05
352
Description
Required
String (AN)
Min 1Max 80

A free-form description to clarify the related data elements and their content

PID Loop end
ACK Loop
OptionalMax >1
Usage notes

When Item details are sent the ACK loop/segment is required.

ACK
270
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 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

IA
Item Accepted
IB
Item Backordered

When sending this code, ACK04 and ACK05 are required.

IC
Item Accepted - Changes Made
IP
Item Accepted - Price Changed

When indicating this code, corrected price needs to be included in the CTP segment.

IR
Item Rejected

Vendors are required to provide an explanation for why item is rejected in the POA header N9/MSG segments.

ACK-02
380
Quantity
Optional
Decimal number (R)
Min 1Max 15

Numeric value of quantity

Usage notes

Required when ACK01 = IB.

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

Required when ACK01 = IB.

067
Current Schedule Delivery
068
Current Schedule Ship
Optional
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD

DTM
280
Detail > PO1 Loop > ACK Loop > DTM

Date/Time Reference

OptionalMax use 1

To specify pertinent dates and times

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

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

017
Estimated Delivery
Required
Date (DT)
CCYYMMDD format

Date expressed as CCYYMMDD

ACK Loop end
PO1 Loop end
Detail end

Summary

CTT Loop
OptionalMax >1
CTT
010
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
030
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

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