Relationship rules

Any time you create a new classification (extend a table), you must create new relationship rules.

The ServiceNow platform relationship rules use separate tables to define the relationships between specific CI base classes and dependent classes. When you extend a table in the CMDB, you must create a new relationship rule in Configuration > Suggested Relationships.

For example, in a default ServiceNow instance, the base class Computer has a Depends on relationship with the dependent class of Computer Peripheral. If you decide to reclassify laptops (classified as Computer by default) into their own base class (for example, [cmdb_ci_laptop]), you must create new rules for the relationships between laptops and other dependent classes, such as peripherals.