.TH Command OPEN
.SY "open"
(There are two market systems available in Empire.  A compile
option determines which particular system a game will use.
The \*Qopen\*U command is used only with the TRADE CENTER market.)
.s3
The \*Qopen\*U command is used to open one or more of your
trade centers (sector type \*Qx\*U) to do business with 
specific countries.  Trade centers which are open will show up 
on other players' \*Qmarket\*U reports, will allow entrance
to their ships and vehicles, and will allow those ships and vehicles
to buy and sell specific commodities (via the \*Qload\*U and \*Qunload\*U
commands).
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The syntax for \*Qopen\*U is:
.EX open <tradecenter-SECT> <to-NAT|*|.> <MULTIPLIER>
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The first parameter is the realm, range, or coordinate of the
trade center(s) you wish to open.  The second parameter is the
name or number of the country you want to open it to, or a `*'
to open the sector to all countries, or a `.' to open it to
yourself (useful for getting a list of countries and multipliers
without changing anyone's open status).  The optional third
parameter is a selling price multiplier; if left unspecified,
the multiplier is assumed to be 1.  (Note: The maximum allowable
multiplier is 1000000.0; the minimum allowable multiplier is 0.01.
Multipliers will be automatically limited to these restrictions.)
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.EX open * .
.NF
   x,y     is open to         multiplier

 -38,-40   ** closed **

  17,-9    (#  0) POGO              1.00
           (#  1) UUCP2             1.00
           (#  4) Samarkand         1.00

  46,-4    (#  4) Samarkand         1.00

3 trade center(s)
.FI
.s3
See also : market, close, ask, bid, load, unload
