Unfortunately we use the plain old "Data Matrix". Often, where there are more than 24 by 24 modules the code is divided into blocks that do not exceed 24 modules on a side to prevent distortion of the code. Hence you get a solid "crosshairs" running through the 2D barcode. Side-by-side example:
crosshairs.png
It's all totally geeky and really "who cares!?!". I get it. But it's important to understand the differences. Knowledge is power. More power to us all to understand the job and what RM uses.
