--example for Legs
local index = 1
local output = {}
output[index]=table.concat({"appearanceCollected","visualId","sourceId","sourceCollected","itemId","sourceType"},";")
 
local sourceNames = {"","Boss Drop","Quest","Vendor","World Drop","Achievement","Profession"}
 
local appearancesList = C_TransmogCollection.GetCategoryAppearances(10) --Legs
for appearanceIndex = 1, #appearancesList do
    local appearancesCollected = appearancesList[appearanceIndex].isCollected
    local appearancesVisualID = appearancesList[appearanceIndex].visualID
 
    local appearanceInfos = {}
    local sourcesList = C_TransmogCollection.GetAppearanceSources(appearancesVisualID)
    for sourceIndex = 1, #sourcesList do
        index = index + 1
        appearanceInfos[1] = tostring(appearancesCollected)
        appearanceInfos[2] = appearancesVisualID
        appearanceInfos[3] = sourcesList[sourceIndex].sourceID
        appearanceInfos[4] = tostring(sourcesList[sourceIndex].isCollected)
        appearanceInfos[5] = sourcesList[sourceIndex].itemID
        appearanceInfos[6] = sourceNames[(sourcesList[sourceIndex].sourceType or 0) + 1]
        output[index] = table.concat(appearanceInfos,";")
    end    
end
 
output = table.concat(output,"\n")
--output is then sent to an editbox