How is the interface name built in the Interfaces (DCFs) table?
Daniela Oliveira [SLC] [DevOps Advocate] Selected answer as best 18th November 2020
When DCF interfaces are pointed to a table, the interface names are built from the defined Parameter Group name (protocol XML) combined with the display key of the table record. See ParameterGroups.Group for more information on how to configure these parameter groups. Via the attribute dynamicUsePK you can also force the interface naming convention to use the primary key (PK) instead of the display key. 
Daniela Oliveira [SLC] [DevOps Advocate] Selected answer as best 18th November 2020
When the ParametersGroups.Group tag does not have a dynamicId. The interface name is the same as the name of the parametergroup.
Also be aware, using the dynamicUsePK not only changes the way the interface name is created. It will also change the content that is checked when trying to filter specific rows from a table using the dynamicIndex attribute.