What Is a Barcode Mask?

Barcode masks are used to read and interpret barcodes when scanned and apply rules to how it should be output or displayed. In short, the mask reads the input from the scanner, translates it accordingly and outputs the result. 

The keys to understanding and setting up accurate barcodes masks are:

• Knowing the actual barcode number on the physical barcode label.
• Knowing what you want the final barcode number to look like in the library system. 

1. The Number That Is being Output by the Scanner

First you need to know exactly what the physical barcode value is, it is normally printed above or below the barcode, but there may be hidden characters. The most effective way to determine the actual barcode is to scan it into a neutral program, such as Microsoft Notepad.

2. The Number of the Resource/Borrower in the System

Now you need to know what you want the barcode to look like in the library system. If you have already added the resource/borrower to the library system, locate it in the appropriate table and note the barcode. If you are yet to add it, you just need to decide what you want it to look like. 

Here are some examples of the changes barcode masks can make to barcodes. 

• 04958 > 4958
• A2654B > 2654
• R0025978T25H > 25978

As you can see, barcode masks are able to modify the barcode by stripping leading 0s and/or removing any unnecessary characters. 

Now that you understand what a barcode mask does, you are ready to start creating one.