Config Item Purposes
From Armagetron
Choose the right kind of setting item:
nSettingItem
Transferred over the network. These are settings that are controlled by the server, such as CYCLE_RUBBER.
tSettingItem
Local settings that are loaded from settings.cfg. They are not saved when you quit the game, and they are only editable from the config files.
tConfItem
Local settings. These are saved when quitting and include things like video card options, resolution settings, player names, instant chats, and the like.
Variants
The XItemLine variant is a specialization of the XItem< tString > class with the difference that it saves and reads whole lines of config files, while the standard item will only read the first word.