[jeruku]

Quick and dirty example.

local frame = CreateFrame('Frame')
local tab = {}
local wait = {}
 
frame:SetScript('OnEvent', function(self, event, ...)
   if event == 'BAG_UPDATE_DELAYED' then
      -- do checks and stuff and get the desired itemID
      local name, link, quality, iLevel, reqLevel, class, subclass, maxStack, equipSlot, texture, vendorPrice = GetItemInfo(itemID)
      if not name then
        wait[itemID] = {}
     else
        -- this may just create a library so you may have to put them in individually with something like tinsert(tab[itemID], name)...
        tab[itemID] = {name, link, quality, iLevel, reqLevel, class, subclass, maxStack, equipSlot, texture, vendorPrice}
     end
   elseif event == 'GET_ITEM_INFO_RECIEVED' then
      -- the info is now downloaded and cached
      local itemID = ...
      if wait[itemID] then
         tab[itemID] = {GetItemInfo(itemID)}
         wait[itemID] = nil
      end
   end
end
 
frame:RegisterEvent('BAG_UPDATE_DELAYED')
frame:RegisterEvent('GET_ITEM_INFO_RECIEVED')