DFC is correct. This would be a CF leg whereas a procedure turn is a PI leg, but in both cases the FMS has to have a fixed point at which to commence the turn. This will be based on still air at the maximum allowable speed for the a/c category - bearing in mind that generally they will be grouped A/B and C/D when the database is created. Some Databases will only offer C/D, so you may find that a procedure turn, for example, takes you out to 4.2nm before turning to intercept. It won't be a reciprocal either - just a continuous turn back to the end of the original CF leg (or CD leg if it was based on a dme range.)
Doc 8168 gives the ranges of speed allowable for the initial approch as:
Cat - A 90/150 (110 for racetrack or course reversals)
Cat B - 120/180 (140 for racetrack or course reversals
Cat C - 160/240
Cat D - 185/250
So you can see that if your database provider is a bit lazy sometimes (as is the case for the UNS-1) and only sticks in the C/D procedures the resulting legs may look a little 'odd' when you attempt to fly them Cat A!
Glad to see your steady progress into this sphere
