GS1-128

The GS1 -128 is a standard developed by the GS1 organization standard based on the Code128. By 2009, the name was UCC/EAN-128 standard and was, among other things also simply called EAN128.

Construction

Obligatory is the encoding of the special character FNC1 after the start character. The applications will be shown so that the code content is structured according to the GS1 specifications. The basis of this concept is held in international standards. GS1 is registered to ISO / IEC 15459-2 as Issuing Agency. The ISO / IEC 15434 specifies how the used structure can be detected and the ISO / IEC 15418 describes the data structure.

Thus, the data obtained from a GS1 - 128 bar code symbol data can be interpreted unambiguously, format and meaning of each representable in the GS1 Application Identifier data - content accurately described.

Each data element comprising a two-to four -digit data identifier, which is preceded by the information to be coded, and makes them distinguishable from other data. These identifiers enable the addressees of a bar code information in a position to interpret all data read. Due to its own requirements, he may select, processed the information in the downstream application programs and which to ignore. In this case, each identifier being associated with a unique format, can occur in both fixed and variable lengths of the identifier. Identifier variable length use either their associated maximum length of or by a control character " FNC1 " limited. In this way, each application can determine the end of the identifier and hence the beginning of the next identifier.

Data identifiers

The standard defines not only a uniform syntax, but also a unified semantics by a bar code information through the use of data identifiers (English Application Identifier ). With the application identifier meaning and format of the subsequent data field each in the process chain involved are known; a confusion between consignment number and a randomly adhering to the package label products is excluded, even if they use the same syntax, the code alphabet of Code128. By using a " Symbologieidentifikators ", the control character " FNC1 " GS1-128 is any application of unique code 128 distinct applications.

Data identifier Frequently used are for example:

  • 00 Number of the shipping unit: a globally unique number of the delivery, international: SSCC (Serial Shipping Container Code )
  • 01 GTIN of the trade item ( item number, 14 digits )
  • 10 lot number / batch number of the product
  • 15 best before date ( YYMMDD )
  • 310x net weight in kilograms ( 6 digits), a value for x is the number of decimal places

Core elements of the GS1 -128 data standards

  • Exact definition of data elements
  • Allocation of qualifying data
  • Definition of formats
  • Embedded in protected media
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