New answers tagged terminology
I would go with "the date range encompassed by the data warehouse is x." This eliminates all possible confusion about the intent by deliberately using words that are understandable by non-technical people.
Scope is another possibility to describe this concept. I.e: The scope of the data warehouse is the past 5 years.
Retention Period, as suggested by Thiago Anitelle, would be accurate if you are trying to say that you keep data for X amount of time. This would work in a scenario where you load data today, 9/25/2015, from a source system that has data for the year of 1980 starting at 1/1/1980. With a retention period of 5 years we indicate that the data loaded today, ...
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