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DMBoK Figure 44 Data Vault Model

The Data Vault is a detail-oriented, time-based, and uniquely linked set of normalized tables that support one or more functional areas of business. It is a hybrid approach, encompassing the best of breed between third normal form and star schema. Data Vaults are designed specifically to meet the needs of enterprise data warehouses. There are three types of entities: hubs, links, and satellites. The Data Vault design is focused around the functional areas of business with the hub representing the primary key. The links provide transaction integration between the hubs. The satellites provide the context of the hub primary key (Linstedt, 2012).

In this figure, Student and Course are hubs, which represent the main concepts within a subject. Attendance is a link, which relates two hubs to each other. Student Contact, Student Characteristics, and Course Description are satellites that provide the descriptive information on the hub concepts and can support varying types of history.  Anchor Modeling is a technique suited for information that changes over time in both structure and content. It provides graphical notation used for conceptual modeling similar to traditional data modeling, with extensions for working with temporal data. Anchor Modeling has four basic modeling concepts: anchors, attributes, ties, and knots. Anchors model entities and events, attributes model properties of anchors, ties model the relationships between anchors, and knots are used to model shared properties, such as states. 

DAMA Data Management Body of Knowledge 2nd Edition, 2017, Print.

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