Off by default.
If on, Boolean keywords and, or,
and not in the search query will be translated into set logic.
The Search Appliance uses set logic internally, and this setting translates
basic boolean statements into proper set logic automatically. This is
a limited translation, and does not support nesting of statements.
For more information on the Search Appliance's use of set logic, please see
the Using Set Logic to Weight Search Items of the Texis
manual on our website.