GS1-128 (formerly UCC/EAN-128) Barcode

This Symbology is also known as EAN-128, UCC-128, USS-128, GS1 128, UCC.EAN-128, GTIN-128, UCC-12, EAN/UCC-13, EAN/UCC-14

Overview
The GS1-128 (formerly UCC/EAN-128) Symbology is a subset of the more general Code 128 Symbology. By agreement among AIM, Inc., GS1 (EAN International and the UCC), use of the Function 1 Character (FNC1) in Code 128 Symbols in the first symbol character position following the Start Character has been reserved exclusively for the GS1 System.
GS1-128 was developed to provide a worldwide format and standard for exchanging common data between companies. While other barcodes simply encode data with no respect for what the data represents, GS1-128 encodes data and encodes what that data represents.
The encodable character used by GS1-128 Symbology is as defined by the International ISO/IEC 646 Standard.
GS1-128 encodes the so called Element Strings which are composed of an Application Identifier (AI) plus a data field. GS1-128 has a list of predefined Application Identifiers (AI) which identifies the meaning and format of the data following it. The AI is a 2, 3, or 4-digit number and it is enclosed in parentheses when printed below the barcode (the parentheses are only for visual clarity, and are not encoded in the barcode!).

Sample of a GS1-128 Barcode

How to encode GS1-128 values using BarcodeItem products

Introduction
GS1-128 encodes the so called Element Strings which are composed of an Application Identifier (AI) plus a data field. Each AI identifies the meaning and format of the data following it. The GS1 System provides more than one hundred Element Strings which can be found on the GS1 General Specification and is summarized in the following table.
Show GS1-128 Application Identifiers
When encoding those element strings into a GS1-128 barcode, the FNC1 function character starts it and is automatically encoded by the BarcodeItem. Also notice that the AI has parentheses around it in the human readable text of a GS1-128 barcode, but the parentheses are not encoded in the barcode itself.
Encoding Single GS1-128 AIs
To encode a single element string like the Global Trade Item Number (GTIN) which AI is (01), you just need to specify the AI + Data Field to the Code property. For example, to encode GTIN 95012345678903 you should:
Concatenation - Encoding multiple GS1-128 AIs into a single barcode
GS1-128 allows several Element Strings to be encoded in one barcode, a process called concatenation. Concatenation is advantageous because it means that the symbology elements are only needed once, and the space required for the symbol is smaller than when separate barcodes are used to encode each Element String. It also improves scanning accuracy, allowing for single scanning rather than multiple scanning. The various Element Strings can be transmitted from the bar code reader as a single full string.

When concatenating AIs, the FNC1 function character is used for marking the end of an AI. The AIs which require the usage of FNC1 are these ones: 10, 21, 22, 240, 241, 242, 250, 251, 253, 254, 30, 37, 390, 391, 392, 393, 400, 401, 402, 403, 420, 421, 422, 423, 424, 425, 426, 7001, 7002, 7003, 7004, 7030, 7031, 7032, 7033, 7034, 7035, 7036, 7037, 7038, 7039, 8001, 8002, 8003, 8004, 8005, 8006, 8007, 8008, 8018, 8020, 8100, 8101, 8102, 8110, 90, 91, 92, 93, 94, 95, 96, 97, 98, and 99. If some of these AIs are the last element string in the concatenation, then the FNC1 is NOT required. If the AI is not listed here, then it does NOT require an FNC1 character either!

If you specify the AIs between parentheses, then the BarcodeItem takes care of the FNC1 character and will automatically add FNC1 for those AIs requiring it based on the list above. For example, to concatenate AI 8005 Price per Unit of Measure (365 currency units) and AI 10 Batch Numbers (123456), you should: