I figure I should stick this here so people will know.
Anyway, here's the rundown of how X's tags work.
journal - These are usually private posts he writes on his computer in his quarters. Usually just a rundown of 'blahblah I did this today blahblah' although sometimes it will also include more personal opinions and thoughts about goings on. These posts are encrypted with the standard Maverick Hunter mainframe system encryptions as well as X's personal encryption codes.
open - These are open posts for anyone to comment on.
meme - These are meme posts and unless marked otherwise are open for commenting from anybody
rp - These are posts where rp stuff or prose happens, or leading into an rp. Not usually open for commenting by everyone unless it's marked as such.
ooc - These are Out-of-Character posts. So it's me talking, not X. These posts are open for commenting as well, but it's all fourth-wall breaking stuff rather than IC.