Star Wars: The Old Republic
fans who have tried to created or find a guild at Guild Headquarters
page must notice that there are 3 types of servers in the page, i.e PvP,
PvE, and RP. BioWare just announced that there will be one more server
type, RP-PvP. Hereby, the original RP (role-playing) server will becomes
RP-PvE server. Below is the difference of the 4 types of servers.

PvE (Player vs Environment) – Players will have
to manually flag themselves if they wish to engage in PvP outside of
designated Warzones and Open World PvP areas.

PvP (Player vs Player) – Players are
automatically flagged for PvP outside of the designated 'safe' areas
(such as Origin Worlds, Capital Worlds, and the Republic/Imperial
Fleets; see below for more info).

RP-PvE – Players are encouraged to roleplay and
act 'in-character' while playing on an RP-PvE server. Players must
manually flag themselves if they wish to engage in PvP outside of
designated Warzones and Open World PvP areas.

RP-PvP – Players are encouraged to roleplay and
act 'in-character' while playing on an RP-PvP server. Players are
automatically flagged for PvP outside of the designated 'safe' areas
(such as Origin Worlds, Capital Worlds, and the Republic/Imperial
Fleets; see below for more info).

Since RP-PvP server is newly-added and it's not available at the official pre-launch Guild Headquarters
page, all guilds that built in RP server are placed into RP-PvE servers
by default. Players who want to build a guild at RP-PvP server "will
need to create their guild manually on a new server once they reach
their Capital World (Dromund Kaas or Coruscant)."


Besides, BioWare revealed the general rulesets in PvP server:

We also wanted to expand on what the PvP server ruleset means in The
Old Republic. The obvious overarching rule is that in general, if you
see a player of the opposite faction, you may immediately engage them in
combat.

The exception to this rule is sanctuaries, which are large areas
where PvP may not take place, regardless of whether you are flagged or
unflagged for PvP. Examples of this are the Origin Worlds (Tython, Ord
Mantell, Hutta, and Korriban), the Capital Worlds for both sides
(Dromund Kaas and Coruscant), and the Republic/Imperial Fleets.

Source: swtor forum