Data about Data
Maintain history about how this particular data set is being manipulated.
Answer CRUD questions.
When was it created?
When was it updated?
When was it deleted?
Would you ever need to "test" your data model somewhere?
How would you build a staging environment?
How many are created/updated/deleted over a certain time period?
How big is your data?
At what rate is your data growing?
What are your backup plans?