The Citizen and Core CMDBs are relics of the monolithic model of the CMDB. The premise is that the core CMDB is the “master” CMDB that holds the unified expanse of all data. The Citizen CMDB “feeds” data into the Core. It implies, in most cases, a two-tier hierarchy. We already mentioned that a true CMS will be multiple LEVELS, built upon a chain of MANAGEMENT Data REPOSITORIES and LIBERAL use of relationships. You can view the Citizen as the MDR at the lower level of a link in the chain and the Core as the higher level of that same link. As you traverse the chain, Cores become Citizens at the next higher link, and the INVERSE is true as you move lower.

The Citizen and Core CMDBs are relics of the monolithic model of the CMDB. The premise is that the core CMDB is the “master” CMDB that holds the unified expanse of all data. The Citizen CMDB “feeds” data into the Core. It implies, in most cases, a two-tier hierarchy. We already mentioned that a true CMS will be multiple levels, built upon a chain of Management Data Repositories and liberal use of relationships. You can view the Citizen as the MDR at the lower level of a link in the chain and the Core as the higher level of that same link. As you traverse the chain, Cores become Citizens at the next higher link, and the inverse is true as you move lower.