very detailed usage description added

README.md

@@ -28,6 +28,76 @@ Node Ownership (node_ownership)
 
 
 
+# Usage
+########################
+
+	NOTE:	If you use a command which needs <PlayerName> as Parameter, the Player you address needs to be online at the moment. Otherwise the command wont work.
+		This does not apply to the Player named "Sandbox".
+
+
+	Set Owner:
+		As a Player with the "privs" privilege you (Grantor) can use this command to grant a concession to a Player (Concessionaire).
+		Remember: Every Owner (Concessionaire) has the right to grant subconcessions for his concessionary area using Add Owner.
+
+		Syntax:		/set_owner <PlayerName> <pos1.x>,<pos1.y>,<pos1.z> <pos2.x>,<pos2.y>,<pos2.z>
+		
+		Parameters:	<PlayerName> 		= Player's Name (Concessionaire)
+				<pos1.x>..<pos2.z>	= Position of two points in the world describing a cuboid
+
+		Example:	/set_owner JohnDoe -100,-100,-100 100,100,100
+
+
+	Add Owner:
+		As a Player with a granted concession (Concessionaire), you can give out subconcessions to other Players (Subconcessionaires).
+		
+		Syntax:		/add_owner <PlayerName> <pos1.x>,<pos1.y>,<pos1.z> <pos2.x>,<pos2.y>,<pos2.z>
+		
+		Parameters:	<PlayerName>		= Player's Name (Subconcessionaire)
+				<pos1.x>..<pos2.z>	= Position of two points in the cuboid of the concession describing a smaller or equal cuboid (unstrict subset)
+
+		Example:	/add_owner SamDoe -100,-100,-100 100,100,100
+
+
+	List Areas:
+		As a Player with the "privs" privilege (Grantor) you can list all areas describing all current concessions and subconcessions.
+		As a Player with a concession (Concessionaire) you can list only your areas.
+
+		The Area Number which is shown is required to delete a concession.
+		For each tuple of (cuboid,playername) there is one area identifier.
+
+		Syntax:		/list_areas
+
+
+	Remove Areas:
+		To remove a concession belonging to a Player (Concessionaire/Subconcessionaire) you need the AreaID from the List Areas command.
+
+		Syntax:		/remove_areas <areaID>
+
+		Parameters:	<areaID>		= Area Identifier from the List Areas command.
+
+		Example:	/remove_areas 1
+
+
+	Change Area Owner:
+		To change a Players (Concessionaire) concession you can use the Change Area Owner command.
+		You need the AreaID from List Areas and the Playername of the new concessionaire.
+
+		Syntax:		/change_area_owner <areaID> <PlayerName>
+
+		Parameters:	<areaID>		= Area Identifier from the List Areas command.
+				<PlayerName>		= Player's Name of the new Concessionaire
+
+		Example:	/change_area_owner 1 FooDoe
+
+
+	Sandbox Concession:
+		A Sandbox concession is a concession where everyone with interact privilege can dig or place.
+
+		To grant a Sandbox concession you have to set an owner to the Player named "Sandbox".
+		It also works for subconcessions using add owner.
+
+
+
 # License and Authors
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