+--------------+
    | application  |
    +--------------+
    | attributes   |  0..* -----------------
    | users        |  0..* ----             |
    +--------------+           |            |
                               1            |
                    +-----------------+     |
                    | user            |     |
                    +-----------------+     |
       ------- 0,1  | brand user      |     |
      |    -- 0..*  | user attributes |     |
      |   |         +-----------------+     |
      |   |                                 |
      |   |                                 1
      |   |                             +-----------------+
      |   |                     ----- 1 | attribute       | 1 --
      |   |                    |        +-----------------+     |
      |   |                     -- 0..* | attribute       |     |
      |   |                             +-----------------+     |
      |   |                                                     |
      |    ---------------------                                |
      |                         |                               |
      |                         |                               |
      |                         1                               |
      |                     +-----------------+                 |
      |             ----- 1 | user attribute  | 1 --------------
      |            |        +-----------------+
      |             -- 0..* | user attribute  |
      |                     +-----------------+
      |
      |                 +-----------------+
       -------------- 1 | brand user      |
                        +-----------------+