Complect bonus, line 7 in armors.
Look at the complect bonuses that give the equipment add on stat in elements, they call the piece of armor(line 7 in armors or ornaments for example) and give the stat for that piece.
You can't make new ones also, you can only edit existing ones. At least as far as I know.
i know i cant make new add on guys.
i use existing addons
i'm not a noob as much as you think.:D
theres several problems with that
1: addons are hardcoded, so you must always asign the right position for them in your own set. (example: the +100 str/int/dex must always be on addon(3), the TT setbonus that gives -0.05 aps must always be assigned as addon(2))
2: you must use different instances of addons to make em stack, you cant use 2x the same id. (example: make 2 sets, each 3 items and asign +100 dex to each set as 3rd addon). they wont stack. so if you want em to stack you will have to find the same addon with a different id.
however, since 1.4.4 pwi has decided to name all their addons properly, so finding the right addon id isnt as hard as it used to be.