Details: The config options like archive_expires_after and http_file_share_expires_after should have their own type, say time_period, which would help to understand what values are appropriate. I think it should contain the following statements Number of seconds: - 10 - 10 seconds - 1.5 * 60 - 1.5 minutes - 60 * 60 - 1 hour - 86400 - 1 day - 24 * 60 * 60 + 60 - 1 day and 1 minute Number of units: - "1 second" - "5 seconds" - "10 minutes" - "15 hours" - "20 days" - "25 months" - "30 years" Infinite number: - "never" Additional: I think the short forms like "1m" should be removed from the documentation altogether. Ref: https://hg.prosody.im/trunk/rev/80a1ce9974e5