A Data Matrix symbol can store between one and 2'335
alphanumeric characters and up to 3'116 numéric characters.
Datamatrix is designed to pack a lot of information in a
very small space.
Applications: small objects identification, like composants
électronic and micro-mechanical components, postal stamps (Switzerland),
documents' identification.
Details of DataMatrix symbol
To know more,
have a look at this document:DataMatrix.pdf