Discussion
The data contained in the data warehouse is described by :
Answer: B
Data warehouse contents are described by metadata.
Metadata is data about data. In a warehouse it records where each item came from, how it was transformed and loaded, its structure and meaning, and how it is summarised, so users and tools can find and interpret the data.
Operational data is the source data from day-to-day systems, relational data is a storage model, and 'active data' is not a descriptive layer; none describes the warehouse contents.
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