What are Configuration Items

Configuration items can be tangible or intagible devices or applications in the cmdb such as firewalls, computers, email services, and business services

Two key cmdb tables are configuration item cmdb_ci which contains ci data, and ci rewlationship dmdb_rel_ci which contain relationship data.

Servicenow relationship rules use separate tables to define the relationships between specific ci base clases and dependetn classes. when you extend a table in the cmdb, you must create a new relationship rule in configuration > suggested Relataionships