Bucket
Specifies when noncurrent object versions expire. Upon expiration, S3 permanently deletes the noncurrent object versions. You set this lifecycle configuration action on a bucket that has versioning enabled (or suspended) to request that S3 delete noncurrent object versions at a specific period in the object's lifetime. For more information about setting a lifecycle rule configuration, see AWS::S3::Bucket Rule.
Properties
Specifies how many noncurrent versions S3 will retain. If there are this many more recent noncurrent versions, S3 will take the associated action. For more information about noncurrent versions, see Lifecycle configuration elements in the Amazon S3 User Guide.
Specifies the number of days an object is noncurrent before S3 can perform the associated action. For information about the noncurrent days calculations, see How Amazon S3 Calculates When an Object Became Noncurrent in the Amazon S3 User Guide.