What do These Columns Represent?

silverdot

When you go to  "Show URL's > Verified"  what do the columns "D" and "I" stand for?

Screenshot : http://prntscr.com/3snvr1

StoimenIliev

"D" must be for "DoFollow" I think

silverdot

Maybe "Do Follow" and sent to "Indexer" ??

Any confirmation on this?

cherub

D = Dofollow
I = Indexable (no robots noindex tag)