a menu item, either a top- or a sub-level one; each item must have a unique ID
id of a menu item
label (text) of a menu item
path to the image for the enabled state of a menu item
path to the image for the disabled state of a menu item
sets a menu item as enabled (true) or disabled (false) by default
sets menu item's type: whether it is a radiobutton (radio), a checkobox (checkbox), or a separator (separator)
sets the name of a radiogroup for several radiobuttons
specifies whether a radiobutton or a checkbox is checked or not