# Retrieval of items from files

The AQL processor uses both the master dictionary and the file
dictionary to determine the definition of the elements in the AQL
sentence. The pointer to the file dictionary and the connectives
used in the sentence, for example, are found in the master
dictionary. The file pointer to the data file and file-specific
attribute definitions are found in the file dictionary.

If an element is defined in both the account master dictionary
and the file dictionary, the definition in the file dictionary is
used.

If the element is not found in either the account master
dictionary or the file dictionary, AQL creates a new element by
concatenating the unknown element to a space and the next element
in the string. The processor attempts to look up this new element
in first the file dictionary and then the account master
dictionary. If the new item-ID is not found, an error message
displays. The AQL processor does not look up terms in the string
that are enclosed in single or double quotation marks, or
backslashes. These are assumed to be literals.

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Source: https://d3codex.com/access/retrieval-of-items-from-files/ - part of the D3Codex reference.