Globally there are a wide variety of barcode standards to choose from.
1. The most commonly used 1D (1-dimensional with linear bars) barcodes:
GS1-128; Code -128
The 1D linear barcodes are the most efficient way to track inventory as it represents a simple sequence of symbols which will refer to a certain item. It doesn't have to carry a lot of information, because the database has all the information about the item available.
2. The most commonly used 2D (2-dimensional) barcodes:
QR code; Data Matrix code.
2D barcodes are most commonly used when there is a need to present more information with the code e.g. direct the user to a URL or share a contact card.
Note: Barcode is a machine-readable way of presenting symbols - e.g. numbers or letters.
How do barcode standards relate to Katana?
Once the scanner is compatible with the barcode and configured as described in the Hardware for scanning article there is no difference which barcode is scanned as scanning a barcode will always translate the image to symbols that can be matched to items in Katana.