An entity with the Barter action has a special market interface to buy and sell resources in exchange for other resources.

'''Example:'''

{{{
        <Actions>
  		<Barter>
 			<Food>1</Food>
 			<Wood>2</Wood>
 			<Stone>2</Stone>
 			<Ore>4</Ore>
  		</Barter>
  	</Actions>
}}}
----

= Food =
''BRIEF DESCRIPTION ::'' Specifies the trading penalty for Food.

The value means that the player gets this number of resources of this resource type for every 1 resource traded.

1:1 ratio.

= Wood =
''BRIEF DESCRIPTION ::'' Specifies the trading penalty for Wood.

The value means that the player gets this number of resources of this resource type for every 1 resource traded.

2:1 ratio.

= Stone =
''BRIEF DESCRIPTION ::'' Specifies the trading penalty for Stone.

The value means that the player gets this number of resources of this resource type for every 1 resource traded.

2:1 ratio.

= Ore =
''BRIEF DESCRIPTION ::'' Specifies the trading penalty for Ore.

The value means that the player gets this number of resources of this resource type for every 1 resource traded.

4:1 ratio.

= Notes: Exchanging Resources =

The Market is used to buy and sell quantities of resources in exchange for other resource types, through the barter user interface. 

Resources are traded at a 2:1 penalty. For example, to purchase 100 Food, the player must spend 200 points of another resource type (Wood, Stone, or Ore). 

Transfer of resources is instantaneous once triggered; no trade units are required to deliver the traded resources.