What Is the Role of Metadata in the Three-Layer Data

Question

Examlex · Accepted Answer

The Answer is Metadata describe other data. There are three types of metadata used in the three-layer architecture:
1. Operational-describes the data in the operational systems that feed the enterprise data warehouse. May exist in different formats and is often poor quality.
2. Enterprise data warehouse metadata describe the reconciled data layer as well as the rules for extracting, transforming, and loading operational data into reconciled data.
3. Data mart metadata-describe the derived data layer and the rules for transforming reconciled data to derived data.

What Is the Role of Metadata in the Three-Layer Data

Definitions: