.----------.                        .------.
    | Registry |                        | TMDB |
    '----------'                        '------'
          |                                 |
 .----------------.                         |
 |  Periodically, |                         |
 |    at least    |                         |
 | every 24 hours |                         |
 '----------------'                         |
          |                                 |
          |-------------------------------->|
          |  Download the latest DNL List   |
          |<--------------------------------|
          |                                 |
          |                                 |