The FDT standard supports both EDDL and DTM configuration methods.

The EDDL (Electronic Device Description Language) allows a device to be described using a text like language. This is then compiled into an EDD file that is unique for each HART, FF, and Profibus network. The host system interprets the compiled EDD file and determines how a device appears in the applications..
While the EDDL method is a simple way to describe the device, it is at the same time limited in the features it offers.

The DTM method of representing a device is consistent in any FDT Frame application. The device supplier is in control of the visualization, functionality and advanced features. This can be compared to a company’s website: It creates a website and wants it to look and feel the same regardless of which internet browser is used and independent of how the information gets to the website – Cable, DSL, dial-up, etc.