System items

System items can be used for:

Like all data items, system items consist of a selector and a value. For information about these selectors and what they are for, see MQAI Selectors.

System items are unique. One or more system items can be identified by a system selector. There is only one occurrence of each system selector.

Most system items can be modified (see Changing information within a bag), but the bag-creation options cannot be changed by the user. You cannot delete system items. (See Deleting data items.)