Composite code
A composite code , also known as a double code symbol, is a special bar code made up of a linear bar code (1D) and an additional 2D code . With the help of a separate pattern, both code parts are separated from each other. Previous readers can still read the primary identification in the 1D code part, but the recognition of the information additionally contained in the 2D code part requires new 2D readers.
In the 2D component, a manufacturer can use the application identifier to display additional information for the corresponding product according to his own requirements. GS1 recommends its use, in particular to encode the expiry date and the batch number, as it is required by law to provide this information at least clearly on products, foodstuffs and in healthcare.
literature
- GS1 Germany, GS1 Austria and GS1 Switzerland (eds.): General GS1 Specifications, January 2006 - Version 7.0