This is the coursebook for the Certified Data Vault Data Modeler CDVDM course. Data Vault modeling is a form of Data Modeling optimized for Agile Data Warehousing and Business Intelligence DWBI programs. As a form of Ensemble Modeling, the Data Vault approach is based on the Unified Decomposition pattern. This pattern models Core Business Concepts (main business entities, similar to business dimensions or enterprise business concepts) using multiple component parts. This separates the things that change (context, descriptions, states, ratings and status for example) from the things that don't change (business keys, static descriptors and core relationships for example). The result is a highly scalable, adaptable, and traceable data store that can capture all data over time with complete historization.