Definition: NOT Search Filter
A NOT search filter is a type of search filter that is intended to serve as a container that holds exactly one embedded search filter. The NOT filter is essentially an inverse operation, and in order for an entry to match a NOT filter, it must not match the embedded filter.
NOT filters may be represented as a string by enclosing the entire filter in parentheses and placing an exclamation point just after the opening parentheses. For example, a filter of "(!(objectClass=person))" will only match an entry if it does not have an object class value of "person".
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