When the query record was created — the age a replay states.
The criteria as asked, for rebuilding the log's display name.
Whether it found anything.
A query that found nothing is indexed as such rather than omitted, so a replay can refuse it knowingly. An absence decays where a hit does not: the patient is scanned next week, and "no imaging found" is the answer a clinician acts on.
Who asked. Part of the log's display name.
The stored CUBE query's id — what a replay decodes.
The PACS this was asked of; part of the key, kept for the listing.
One entry with the key it is filed under.