**To describe event categories** The following ``describe-event-categories`` example lists the available event categories. :: aws dms describe-event-categories Output:: { "EventCategoryGroupList": [ { "SourceType": "replication-instance", "EventCategories": [ "low storage", "configuration change", "maintenance", "deletion", "creation", "failover", "failure" ] }, { "SourceType": "replication-task", "EventCategories": [ "configuration change", "state change", "deletion", "creation", "failure" ] } ] } For more information, see `Working with Events and Notifications <https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Events.html>`__ in the *AWS Database Migration Service User Guide*.