filter

The filtering rules that determine which objects trigger notifications. For example, you can create a filter so that Amazon S3 sends notifications only when image files with a `.jpg` extension are added to the bucket. For more information, see Configuring event notifications using object key name filtering in the Amazon S3 User Guide. Specifies object key name filtering rules. For information about key name filtering, see Configuring event notifications using object key name filtering in the Amazon S3 User Guide.

The filtering rules that determine which objects trigger notifications. For example, you can create a filter so that Amazon S3 sends notifications only when image files with a `.jpg` extension are added to the bucket. For more information, see Configuring event notifications using object key name filtering in the Amazon S3 User Guide. Specifies object key name filtering rules. For information about key name filtering, see Configuring event notifications using object key name filtering in the Amazon S3 User Guide.