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Barcode Education » Code 128
Introduction
UCC/EAN-128 was developed to provide a worldwide standard for exchanging data between different companies. UCC/EAN-128 not only encodes the data, but provides a method of defining the meaning of the data by defining a list of "Application Identifiers" (A.I.).

UCC/EAN-128 is by itself not a symbology.

It is a standard that defines what kind of data is, how data is formatted. UCC/EAN-128 encodes data using Code128 symbology so the printing requirement of Code128 symbology still applies to UCC/EAN-128.

Structure of a Code 93 barcode
A typical UCC/EAN-128 barcode has the following structure:
1. A code128 start character(START-A, START-B or START-C)
2. A code128 FNC1 character
3. Application Identifier (AI)
4. Message encoded
5. Check character
6. Stop Character
7. Termination bar

Application Identifier
Every UCC/EAN-128 symbol encodes an AI to indicate that what type of data is encoded. In most of cases, AI also decides the length of the data and the format of the data. All dates are represented in the format YYMMDD. YY values between 51-99 indicates the years between 1951 and 1999. YY values between 00-50 indicates the years between 2000 and 2050.

If the AI numbers contain an 'x' or 'y', that means a single digit needs to be appended to the AI. x digit indicates the length of the following data field; y digit indicates the ordinal of the decimal point in the data field.

AI AI Description Data Structure After AI Code
00 Serial Shipping Container Code (SSCC-18) 18 digits
01 Shipping Contained Code (SSCC-14) 14 Digits
02 Number of containers contained in another unit (used with AI 37) 14 Digits
10 Batch Numbers 1-20 Alphanumeric
11 Production Date 6 Digits: YYMMDD
13 Packaging Date 6 Digits: YYMMDD
15 Sell By Date (Quality Control) 6 Digits: YYMMDD
17 Expiration Date (Safety Control) 6 Digits: YYMMDD
20 Product Variant 2 Digits
21 Serial Number 1-20 Alphanumeric
22 HIBCC Quantity, Date, Batch and Link 1-29 Alphanumeric
23x Lot Number 1-19 Alphanumeric
240 Additional Product Identification 1-30 Alphanumeric
250 Second Serial Number 1-30 Alphanumeric
30 Quantity Each -
310y Product Net Weight in Kg 6 Digits
311y Product Length/1st Dimension (Meters) 6 Digits
312y Product Width/Diameter/2nd Dimension (Meters) 6 Digits
313y Product Depth/Thickness/3rd Dimension (Meters) 6 Digits
314y Product Area (Square Meters) 6 Digits
315y Product Volume (Liters) 6 Digits
316y Product Volume (Cubic Meters) 6 Digits
320y Product Net Weight (Pounds) 6 Digits
321y Product Length/1st Dimension (Inches) 6 Digits
322y Product Length/1st Dimension (Feet) 6 Digits
323y Product Length/1st Dimension in (Yards) 6 Digits
324y Product Width/Diamater/2nd Dimension (Inches) 6 Digits
325y Product Width/Diameter/2nd Dimension (Feet) 6 Digits
326y Product Width/Diameter/2nd Dimension (Yards) 6 Digits
327y Product Depth/Thickness/Height/3rd Dimension (Inches) 6 Digits
328y Product Depth/Thickness/Height/3rd Dimension (Feet) 6 Digits
329y Product Depth/Thickness/Height/3rd Dimension (Yards) 6 Digits
330y Container Gross Weight (Kg) 6 Digits
331y Container Length/1st Dimension (Meters) 6 Digits
332y Container Width/Diameter/2nd Dimension (Meters) 6 Digits
333y Container Depth/Thickness/3rd Dimension (Meters) 6 Digits
334y Container Area (Square Meters) 6 Digits
335y Container Gross Volume (Liters) 6 Digits
336y Container Gross Volume (Cubic Meters) 6 Digits
340y Container Gross Weight (Pounds) 6 Digits
341y Container Length/1st Dimension (Inches) 6 Digits
342y Container Length/1st Dimension (Feet) 6 Digits
343y Container Length/1st Dimension in (Yards) 6 Digits
344y Container Width/Diamater/2nd Dimension (Inches) 6 Digits
345y Container Width/Diameter/2nd Dimension (Feet) 6 Digits
346y Container Width/Diameter/2nd Dimension (Yards) 6 Digits
347y Container Depth/Thickness/Height/3rd Dimension (Inches) 6 Digits
348y Container Depth/Thickness/Height/3rd Dimension (Feet) 6 Digits
349y Container Depth/Thickness/Height/3rd Dimension (Yards) 6 Digits
350y Product Area (Square Inches) 6 Digits
351y Product Area (Square Feet) 6 Digits
352y Product Area (Square Yards) 6 Digits
353y Container Area (Square Inches) 6 Digits
354y Container Area (Square Feet) 6 Digits
355y Container Area (Suqare Yards) 6 Digits
356y Net Weight (Troy Ounces) 6 Digits
360y Product Volume (Quarts) 6 Digits
361y Product Volume (Gallons) 6 Digits
362y Container Gross Volume (Quarts) 6 Digits
363y Container Gross Volume (Gallons) 6 Digits
364y Product Volume (Cubic Inches) 6 Digits
365y Product Volume (Cubic Feet) 6 Digits
366y Product Volume (Cubic Yards) 6 Digits
367y Container Gross Volume (Cubic Inches) 6 Digits
368y Container Gross Volume (Cubic Feet) 6 Digits
369y Container Gross Volume (Cubic Yards) 6 Digits
37 Number of Units Contained (Used with AI 02) 1-8 Digits
400 Customer Purchase Order Number 1-29 Alphanumeric
410 Ship To/Deliver To Location Code (EAN13 or DUNS code) 13 Digits
411 Bill To/Invoice Location Code (EAN13 or DUNS code) 13 Digits
412 Purchase From Location Code (EAN13 or DUNS code) 13 Digits
420 Ship To/Deliver To Postal Code (Single Postal Authority) 1-9 Alphanumeric
421 Ship To/Deliver To Postal Code (Multiple Postal Authority) 4-12 Alphanumeric
8001 Roll Products - Width/Length/Core Diameter 14 Digits
8002 Electronic Serial Number (ESN) for Cellular Phone 1-20 Alphanumeric
8003 UPC/EAN Number and Serial Number of Returnable Asset 14 Digit UPC +1-16 Alphanumeric Serial Number
8004 UPC/EAN Serial Identification 1-30 Alphanumeric
8005 Price per Unit of Measure 6 Digits
8100 Coupon Extended Code: Number System and Offer 6 Digits
8101 Coupon Extended Code: Number System, Offer, End of Offer 10 Digits
8102 Coupon Extended Code: Number System preceeded by 0 2 Digits
90 Mutually Agreed Between Trading Partners 1-30 Alphanumeric
91 Internal Company Codes 1-30 Alphanumeric
92 Internal Company Codes 1-30 Alphanumeric
93 Internal Company Codes 1-30 Alphanumeric
94 Internal Company Codes 1-30 Alphanumeric
95 Internal Company Carrieres 1-30 Alphanumeric
96 Internal Company Carrieres 1-30 Alphanumeric
97 Internal Company Codes 1-30 Alphanumeric
98 Internal Company Codes 1-30 Alphanumeric
99 Internal Company Codes 1-30 Alphanumeric

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