Ucc/Ean 128, also known as GS1-128, is to establish a standard way of labeling a package with more information than just a product code. It provides supplemental information such as batch number and "use before" dates.

UCC/EAN/GS1-128 use the Code 128 symbology with Application Identifier.

Application Identifier
An Application Identifier is a prefix code used to identify the meaning and the format of the data that follows it (data field).

There are AIs for identification, traceability, dates, quantity, measurements, locations, and many other types of information. The predefined AI useing in ezBarcodeComponent is listed as following table:



Encoding
Ucc/Ean 128 uses the same encoding as Code 128.

Use Caret (^)
The UseCaret propeties is set to true by default which is only apply to Code128, UccEan128, Sscc18, Scc14, PDF417, MacroPDF417, QR Code, and DataMatrix etc. where full ASCII is accepted as encoding. The 3 digits data following the caret will be treated as ASCII code, e.g. ^010 is \\n.
For Code 128, UccEan128, if the FNC1 (ASCII 202) is used, human readable parentheses can be added to the CodeData manually by using the following ASCII code

^222 = (XX)
^223 = (XXX)
^224 = (XXXX)
^225 = (XXXXX)
^226 = (XXXXXX)
^227 = (XXXXXXX)

The ^222, ^223, ^224, ^225, ^226, ^227 will be transfer to FNC1 (ASCII 202) in the barcode, and the parantheses will be added to human readable text by the digits. The FNC1 can also be added by using ^202 (ASCII 202), or Ê. For example, CodeData ="Ê0123456789" is the same as CodeData ="^2020123456789".

ezBarcodeComponent will automatically identify AI by using the predefined AI table above. However, you can overwrite the predefined AI by using caret (^).

For example, to encode (012)345678, the data of ^223012345678 would be used to overwrite the default (01)23456789.

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Ucc/Ean 128 examples by using ezBarcodeComponent
[C#]



        using ezBarcodeComponent.Winform; 

        //create barcode class
        Barcode barcode1 = new Barcode(); 
                                                                        
        //Specify the CodeData to encode
        barcode1.CodeData = "01000123456789004100123456789012";
        //Set the Symbology to UccEan128
        barcode1.Symbology = Symbologies.UccEan128;
   barcode1.UseCaret= true;



   //Save the image
        barcode1.SaveImageAs("UccEan128.gif", System.Drawing.Imaging.ImageFormat.Gif);



[Vb.net]

      'create barcode class
        Dim barcode1 As New Barcode
                                                                
        'Specify the CodeData to encode 
        barcode1.CodeData = "01000123456789004100123456789012"
        'Set the Symbology to UccEan128
 barcode1.Symbology = Symbologies.UccEan128
        barcode1.UseCaret= True



   'Save the image  
        barcode1.SaveImageAs("UccEan128.gif", System.Drawing.Imaging.ImageFormat.Gif)
                        

Example of Ucc/Ean 128 barcode images.   AI will automatically be applied to CodeData 01000123456789004100123456789012 to (01)00012345678900(410)0123456789012.
Or you can overwrite the predefined AI table by using "^2220100012345678900^2234100123456789012"  

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