How does Margaret Cone actually use the abbreviations?
The numbers following DN, for example, refer to a sutta number,
whereas the numbers following D refer to a volume and page number in
the PTS Pali edition.
For example, Mahasatipatthana Sutta would be DN 22 but D ii 289.
Also, I think that Margaret Cone's new dictionary is being prepared
on behalf of the PTS, no?