# User-defined default dictionary items

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, 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`.

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Source: https://d3codex.com/attributedefiningitem/user-defined-default-dictionary-items/ - part of the D3Codex reference.