This object represents the managed object id of notification traps. The managed object id uniquely identifies the source of the notification and consists of class and instance information for the source. It is represented by a formated text string which first contains the class and depending on the class a list of attribute name and value pairs: '<class>:<name>=<value>;<name>=<value>;...' <class> : class name. <name> : attribute name. <value> : attribute value.