Basically, a subzone tells the website to treat POIs coming into eithe map as being the same map. However, there are two seperate ZoneRect Entries, two seperate maps, and two seperate icons_* files generated.
The best example of this is the basement of Nektropos Castle. Although it's the SAME map, it could easily have been a seperate map. The reason it's a subzone, though, is so it has all the same POIs, regardless of where you are on the map.
You'll enter the info for the subzone as two seperate DB entries, but you'll need to set the subzone_of information to point to the zone it's a subzone of, and set the type as SUBZONE. The map IS different, even though it's the same . . . You'll note that it will generate the same XML as above.
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