Index: Locale/enUS.lua
===================================================================
--- Locale/enUS.lua	(revision 38424)
+++ Locale/enUS.lua	(working copy)
@@ -106,6 +106,7 @@
 	["CATEGORY_CLASS"] = "CLASS",
 	["CATEGORY_CUSTOM"] = "CUSTOM",
 	["CATEGORY_PT"] = "PT",
+	["CATEGORY_ADDON"] = "ADDON",
 	
 	
 	-- system categories
@@ -190,6 +191,10 @@
 	["CATEGORY_CLASS_WARRIOR"] = "WARRIOR",
 
 
+	-- addon categories
+	["CATEGORY_ADDON_ITEMRACK"] = "ITEMRACK",
+
+
 	-- location names
 	["LOCATION_BAG"] = "Bags",
 	["LOCATION_BANK"] = "Bank",
Index: ArkInventory.toc
===================================================================
--- ArkInventory.toc	(revision 38424)
+++ ArkInventory.toc	(working copy)
@@ -8,7 +8,7 @@
 ## DefaultState: Enabled
 ## LoadOnDemand: 0
 ## SavedVariables: ARKINVDB
-## OptionalDeps: Ace2, DewdropLib, GratuityLib, PeriodicTable-3.0
+## OptionalDeps: ItemRack, Ace2, DewdropLib, GratuityLib, PeriodicTable-3.0
 ## X-Embeds: Ace2, DewdropLib, GratuityLib, PeriodicTable-3.0
 
 Libs\AceLibrary\AceLibrary.lua
Index: ArkInventory.lua
===================================================================
--- ArkInventory.lua	(revision 38424)
+++ ArkInventory.lua	(working copy)
@@ -154,6 +154,10 @@
 		[302] = ARKINV_L["CATEGORY_EMPTY_UNKNOWN"],
 	},
 
+	CATEGORY_ADDON = {
+		[401] = ARKINV_L["CATEGORY_ADDON_ITEMRACK"],
+	},
+
 	CACHE_CATEGORY_DEFAULT = { },
 	
 }
@@ -1411,6 +1415,7 @@
 		[ARKINV_L["CATEGORY_EMPTY"]] = ARKINV_G.CATEGORY_EMPTY,
 		[ARKINV_L["CATEGORY_CUSTOM"]] = self.db.profile.option.global.category.custom,
 		[ARKINV_L["CATEGORY_PT"]] = self.db.profile.option.global.category.pt,
+		[ARKINV_L["CATEGORY_ADDON"]] = ARKINV_G.CATEGORY_ADDON,
 	}
 	
 	local n
@@ -1747,6 +1752,23 @@
 		return self:ItemCategoryID( ARKINV_L["CATEGORY_POTION"] )
 	end
 
+	-- check if the given item belongs to item rack
+	if i.h and IsAddOnLoaded("ItemRack") then
+		local _, _, item_id = strfind(i.h, "(item:%d+:%d+:%d+:%d+)")
+		_, _, item_id = strfind(item_id or "", "item:(%d+:%d+:%d+):%d+")
+		for set_name, set_items in pairs(Rack_User[UnitName("player").." of "..GetRealmName()].Sets)
+		do
+			if set_name and set_items and not strfind(set_name, "^ItemRack") and not strfind(set_name, "^Rack-") then
+				for _, set_item in pairs(set_items)
+				do
+					if set_item and set_item.id and set_item.id == item_id then
+						return self:ItemCategoryID(ARKINV_L["CATEGORY_ADDON_ITEMRACK"])
+					end
+				end
+			end
+		end
+	end
+
 	-- soulbound items that need to be categorised somewhere else other than soulbound
 	if i.sb or gt:Find( ARKINV_L["TOOLTIP_SOULBOUND"] ) then
 
@@ -4683,6 +4705,7 @@
 			[4] = ARKINV_L["CATEGORY_EMPTY"],
 			[5] = ARKINV_L["CATEGORY_CUSTOM"],
 			[6] = ARKINV_L["CATEGORY_PT"],
+			[7] = ARKINV_L["CATEGORY_ADDON"],
 		}
 		
 		dd:Open( this,
@@ -4887,6 +4910,7 @@
 			[3] = ARKINV_L["CATEGORY_CLASS"],
 			[4] = ARKINV_L["CATEGORY_EMPTY"],
 			[5] = ARKINV_L["CATEGORY_CUSTOM"],
+			[6] = ARKINV_L["CATEGORY_ADDON"],
 		}