TriDoc uses generally two types of barcodes.

The TriDoc barcode is a unique identifier which can be defined for each document version. In practice this means that you can stick on each printed document version a barcode (generated by TriDoc or another system) and if you register this barcode in the system you can use the barcode later for searching purposes.

The Shelf barcode is used for the localization of the documents. You can stick a barcode on a shelf, a physical document storage or a folder. If you register the documents you can also register the shelf barcode, where the document is physically stored. Later if you want to list for example all documents stored in a given physical folder without looking in manually through you only need a barcode scanner and you can search for the documents in TriDoc easily on the Archive-search screen (and also on the Dashboard).