In a Data Vault model, which component captures historical attributes?

In a Data Vault model, which component captures historical attributes?

• A. Hubs
• B. Links
• C. Satellites
• D. Primary keys

Answer: (C)

In Data Vault modeling, the component that holds descriptive attributes and their changes over time is the satellite. Satellites attach to hubs (and to links) and store the attribute data along with time-based metadata, so you can see how values evolve. Rather than updating a single row, a new satellite row is added whenever an attribute changes, preserving historical history and enabling time-variant analysis. Hubs carry only the stable business keys, and links represent relationships, while primary keys are not the mechanism for recording history. So the satellite is the part that captures historical attributes.

In Data Vault modeling, the component that holds descriptive attributes and their changes over time is the satellite. Satellites attach to hubs (and to links) and store the attribute data along with time-based metadata, so you can see how values evolve. Rather than updating a single row, a new satellite row is added whenever an attribute changes, preserving historical history and enabling time-variant analysis. Hubs carry only the stable business keys, and links represent relationships, while primary keys are not the mechanism for recording history. So the satellite is the part that captures historical attributes.