Retention policy

Hello !

The 12.2 backup manual says this about retention policy:

For example, if you implement a recovery window of 1 week, then RMAN retains full backups and required incremental backups and archived logs so that the database can be recovered up to 7 days in the past.

Does that mean that archivelog deletion policy should be set to none ?

Or should you set it to comply with retention policy of 7 days

If archivelog deletion policy is set to none, will they be obsolete when the backups are obsolete ( 7 days)?

will Setting archive deletion policy to 1 or in a script run delete noprompt archivelog all backed up 1 times to device type 'DISK'; make any sense ? I assume it will be ignored with retention set ...