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**To describe all Amazon DocumentDB event categories**
The following ``describe-event-categories`` example lists all categories for the Amazon DocumentDB event source type ``db-instance``. ::
aws docdb describe-event-categories \
--source-type db-cluster
Output::
{
"EventCategoriesMapList": [
{
"SourceType": "db-cluster",
"EventCategories": [
"failover",
"maintenance",
"notification",
"failure"
]
}
]
}
For more information, see `Viewing Event Categories <https://docs.aws.amazon.com/ documentdb/latest/developerguide/managing-events.html#viewing-event-categories>`__ in the *Amazon DocumentDB Developer Guide*.