Since record sets have 2-level deletion, like bibs, items, and authorities, the RecordSets table should have a RecordStatusDate column.

When using the 2-level deletion to manage record clean-up, it is usual to purge records that have been deleted for a certain amount of time, but without the deletion date it is harder to determine. Because the modification date of deleted record sets is still updated by some actions taken on the records in the set (e.g. merging over a record), the only way to determine the deletion is by querying the transactions database.

With the record status date added, determining which record sets are eligible for purging would be as easy as it is for bibs, items, and authorities.