A question about "Figure 1: Stream States" of the http2 draft.

Hi,

When I read "5.1. Stream States" in http2 draft, I felt difficult to
understand "Figure 1: Stream States" because I couldn't find a description
for the acronyms used in the figure.

My guesses are:

PP: PUSH_PROMISE
H: HEADERS
ES: END_STREAM
R: RST_STREAM

Are they right?