diff --git a/classes/dataholders/listholder.lua b/classes/dataholders/listholder.lua
new file mode 100644
index 0000000..409c1d4
--- /dev/null
+++ b/classes/dataholders/listholder.lua
@@ -0,0 +1,39 @@
+local ListHolder = Object:extend()
+
+function ListHolder:new(key, datas)
+    self.key = key
+    self.datas = datas
+    self.list = {}
+end
+
+function ListHolder:applyCommand(command, args)
+    if (command == "") then
+        self:add(args)
+    elseif (command == "reset") then
+        self:reset()
+    elseif (command == "replace") then
+        self:replace(args)
+    end
+end
+
+function ListHolder:reset()
+    self.list = {}
+end
+
+function ListHolder:add(datas)
+    table.insert(self.list, datas)
+end
+
+function ListHolder:replace(datas)
+    for index, args in ipairs(self.list) do
+        if (args[1] == datas[1]) then
+            self.list[index] = args
+        end
+    end
+end
+
+function ListHolder:reduce(list, level)
+    return self.list
+end
+
+return ListHolder
\ No newline at end of file
diff --git a/classes/dataholders/simpleholder.lua b/classes/dataholders/simpleholder.lua
new file mode 100644
index 0000000..f6a0418
--- /dev/null
+++ b/classes/dataholders/simpleholder.lua
@@ -0,0 +1,18 @@
+local SimpleHolder = Object:extend()
+
+function SimpleHolder:new(key, datas)
+    self.key = key
+    self.datas = datas
+    self.value = nil
+end
+
+function SimpleHolder:applyCommand(command, args)
+    print(self.key, command, args)
+    self.value = args
+end
+
+function SimpleHolder:reduce(list, level)
+    return self.value
+end
+
+return SimpleHolder
\ No newline at end of file
diff --git a/classes/datalist.lua b/classes/datalist.lua
index e0924b8..e78d5d5 100644
--- a/classes/datalist.lua
+++ b/classes/datalist.lua
@@ -1,7 +1,10 @@
-local Data = Object:extend()
+local RawData = Object:extend()
 local DataList = Object:extend()
 
-function Data.fromLine(line)
+local ListHolder = require "classes.dataholders.listholder"
+local SimpleHolder = require "classes.dataholders.simpleholder"
+
+function RawData.fromLine(line)
     line = utils.removeComment(line)
     if (#line == 0) then
         return nil
@@ -20,33 +23,76 @@ function Data.fromLine(line)
         levelString = utils.trim(command[2]);
         level = tonumber(levelString) or 0
     end
-    return Data(name, commands.clean(args, name), level)
+    return RawData(name, commands.clean(args, name), level)
 end
 
-function Data:new(name, arguments, level)
+function RawData:new(name, arguments, level)
     self.name = name
     self.arguments = arguments
     self.level = level
 end
 
+function RawData:canBeUsed(level)
+    return level >= self.level
+end
+
+function RawData:getKey()
+    return utils.split(self.name, ".", true)[1]
+end
+
+function RawData:getCommand()
+    return utils.split(self.name, ".", true)[2] or ""
+end
+
+function DataList.getHolder(key, value)
+    if (value.dataType == "comp" or value.dataType == "list") then
+        print("list", key, value)
+        return ListHolder(key, value)
+    end
+    print("simple", key, value.dataType)
+    return SimpleHolder(key, value)
+end
+
 function DataList:new()
     self.list = {}
+    self.holders = {}
     self.reducedList = {}
     for key, value in pairs(commands.getDefaults()) do
-        table.insert(self.list, Data(key, value, 0))
+        table.insert(self.list, RawData(key, value, 0))
+    end
+    for key, struct in pairs(commands.structs) do
+        self.holders[key] = DataList.getHolder(key, struct)
     end
 end
 
 function DataList:addLine(line)
-    table.insert(self.list, Data.fromLine(line))
+    table.insert(self.list, RawData.fromLine(line))
 end
 
 function DataList:reduce()
+    local level = 0
+    for _, rawdata in ipairs(self.list) do
+        if (rawdata.name == "level") then
+            rawdata = rawdata.arguments
+        end
+    end
+
+    for _, rawdata in ipairs(self.list) do
+        if (rawdata:canBeUsed(level)) then
+            self.holders[rawdata:getKey()]:applyCommand(rawdata:getCommand(), rawdata.arguments)
+        end
+    end
+
+    for key, holder in pairs(self.holders) do
+        self.reducedList[key] = holder:reduce(level)
+    end
+
     --TODO
 end
 
 function DataList:prepareJson()
-    return self.list
+    self:reduce()
+    return self.reducedList
 end
 
 return DataList
\ No newline at end of file
diff --git a/libs/commands.lua b/libs/commands.lua
index d1917eb..ff46503 100644
--- a/libs/commands.lua
+++ b/libs/commands.lua
@@ -57,4 +57,6 @@ function functions.clean(args, command)
     return args
 end
 
+functions.structs = struct
+
 return functions
\ No newline at end of file
diff --git a/struct.lua b/struct.lua
index 27a0976..99b7ef0 100644
--- a/struct.lua
+++ b/struct.lua
@@ -1,6 +1,6 @@
 return {
-    name={contentType = "string"},
-    level={contentType = "number", default = 0},
+    name={contentType = "string", preParse = true},
+    level={contentType = "number", default = 0, preParse = true},
     atk= {dataType= "stat", modulo= 5, default= 50, max=255, min=10},
     con= {dataType= "stat", modulo= 5, default= 50, max=255, min=10},
     hab= {dataType= "stat", modulo= 5, default= 50, max=255, min=10},
@@ -17,7 +17,7 @@ return {
     armurephy= {dataType= "stat", modulo= 1, default= 0, max=9999999, min=0},
     armurepsy= {dataType= "stat", modulo= 1, default= 0, max=9999999, min=0},
     armurespe= {dataType= "stat", modulo= 1, default= 0, max=9999999, min=0},
-    armes= {datatype= "list", args=2},
-    competences= {datatype= "comp"}, -- on va le gérer différemment comme du code lol sinon c'est trop relou
-    armes= {datatype= "list", args=1},
+    armes= {dataType= "list", args=2},
+    competence= {dataType= "comp"}, -- on va le gérer différemment comme du code lol sinon c'est trop relou
+    armes= {dataType= "list", args=1},
 }
\ No newline at end of file