...
The device identifiers (DI) domain is used to represent the device information details. For this particular example, the device type was the only detail of interest to the researchers. The sequence number (DISEQ) is specific to each device; note there are two different CMR scanners noted with different values in the SPDEVID variable. Each scanners scanner has a value of "1" for the DISEQ variable since there is only one record or row for each device.
...