These default attribute defining items are found in the dictionary of the data file. If no ADIs are explicitly requested in an AQL report, the default fields display automatically.
Default attribute items must have a numeric item-ID starting with 1. These item-IDs are used by AQL commands as output specifications if no other output specifications are specified, including a defined output-macro in the file-defining item.
The numeric item-IDs must be consecutive; that is, in order to have the third attribute list, by default, attribute items 1 and 2 must exist, even if they are not needed for the listing. The attribute items for attributes that are not needed for listings can be given a dictionary code of x.