Shambala108 wrote: The index file was mentioned in Castrovalva and played an important part in resolving the mystery of the place Castrovalva (I posted a series of quotes from the story above). So it is part of the DWU.
Again, this is absolutely untrue, as your earlier transcript proves. There is no such thing as a "Tardis Index File". There is an index file (generic computing term) of the Tardis Information System.