Moody's Sovereign Ratings: Clarification on Definitions and Symbols

I'm working with sovereign ratings at present. With regard to Moody's there are a few things unclear to me in their definitions. Both questions refer to the sovereign rating history in Bloomberg CSDR (Foreign Currency LT debt)

1. What does a (P) prefix indicate? Example (taken from Cyprus): (P)Caa3, (P)B3 and (P)Ba3. It is not clear to me what this prefix indicates and I couldn't find any explanation in their methodolgy.

2. What does the rating WR stand for?