Metaclasses

A metaclass is a class that defines other classes. In the cell, you cannot create, modify, or delete metaclasses.

Metaclasses define the name of a tag, or a placeholder, for the class definition. The following metaclasses are defined in the mc_root_internal.baroc file:

• MC_EV_CLASS 
• MC_DATA_CLASS 
• MC_PUBLISH_DATA_CLASS 
• MC_INTERFACE 
• TEC_CLASS

  Warning

  Note

  For Tivoli users: The T/EC (Tivoli Enterprise Console) metaclass definitions are built in the cell, but their definition is reflected in the mc_root_internal.baroc file.

The syntax for defining event and data classes is essentially the same; however, their core classes and metaclasses differ:

Core and metaclass event and data classes

Class type	Event	Data
Metaclass	MC_EV_CLASS	MC_DATA_CLASS
Base class	CORE_EVENT	CORE_DATA

For information about the default event and data class definitions, see Event-and-data-classes.

Every service model component class whose instances are published from BMC Atrium CMDB are instances of MC_PUBLISH_DATA_CLASS. In publish mode, instances of this class cannot be modified by external clients (mposter command). For more information about service model component classes and service model publishing, see Service-model-component-data-classes.