# Using GS1 Data Matrix Codes #### WARNING This library is deprecated, use [**EasyMatrixCode2**](../index.html.md) instead. **EasyMatrixCode** is able to find and decode GS1-compliant data matrix codes. The GS1 standard adds semantic identifiers to the contents of a data matrix code. These identifiers are interpreted in an easy and consistent way. The structure of GS1-compliant content is as follows: ```default ]d2[GS1]{Id1}{Value1}[GS1]{Id2}{Value2}… ``` where: * `]d2` is the string identifying a GS1-compliant stream * `[GS1]` is the GS1 escape character (0x1d) * `{Id}` is an application identifier * `{Value}` is the value associated with that identifier. **Example**: The string: ```default ]d2[GS1]11180112[GS1]15190101 ``` is interpreted as follows: * It contains two GS1 parts: `11180112` and `15190101`. * The first `(11180112)` is composed of the identifier `11` and the value `180112`, meaning that the product has a production date (the meaning of identifier `11`) of January 12th, 2018. * The second `(15190101)` is composed of the identifier `15` and the value `190101`, meaning that the product has a best before date (the meaning of identifier `15`) of January 1st, 2019. #### SEE ALSO For more information, see [https://www.gs1.org/](https://www.gs1.org/)