rpg/schema/builtin/rpg_battle = Battle from the map
rpg/schema/builtin/rpg_battle_desc = Enemies, comma separated; the win flag is set on victory
rpg/schema/field/enemies = Enemies
rpg/schema/field/win_flag = Win flag
rpg/schema/builtin/rpg_teleport = Teleport on the map
rpg/schema/builtin/rpg_teleport_desc = A cell and a facing; the map is optional
rpg/schema/field/map = Map
rpg/schema/field/x = X
rpg/schema/field/y = Y
rpg/schema/field/dir = Facing

rpg/schema/field/visual_groups=Image groups
rpg/schema/field/visual_groups_desc=Exact tile patterns, anchors and planes for whole objects.