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  |   Domain 5                                                      |
  |                              -----                              |
  |                             |PCE 5|                             |
  |                              -----                              |
  |                                                                 |
  |    ----------------     ----------------     ----------------   |
  |   | Domain 1       |   | Domain 2       |   | Domain 3       |  |
  |   |                |   |                |   |                |  |
  |   |        -----   |   |        -----   |   |        -----   |  |
  |   |       |PCE 1|  |   |       |PCE 2|  |   |       |PCE 3|  |  |
  |   |        -----   |   |        -----   |   |        -----   |  |
  |   |                |   |                |   |                |  |
  |   |            ----|   |----        ----|   |----            |  |
  |   |           |BN11+---+BN21|      |BN23+---+BN31|           |  |
  |   |   -        ----|   |----        ----|   |----        -   |  |
  |   |  |S|           |   |                |   |           |D|  |  |
  |   |   -        ----|   |----        ----|   |----        -   |  |
  |   |           |BN12+---+BN22|      |BN24+---+BN32|           |  |
  |   |            ----|   |----        ----|   |----            |  |
  |   |                |   |                |   |                |  |
  |   |         ----   |   |                |   |   ----         |  |
  |   |        |BN13|  |   |                |   |  |BN33|        |  |
  |    -----------+----     ----------------     ----+-----------   |
  |                \                                /               |
  |                 \       ----------------       /                |
  |                  \     |                |     /                 |
  |                   \    |----        ----|    /                  |
  |                    ----+BN41|      |BN42+----                   |
  |                        |----        ----|                       |
  |                        |                |                       |
  |                        |        -----   |                       |
  |                        |       |PCE 4|  |                       |
  |                        |        -----   |                       |
  |                        |                |                       |
  |                        | Domain 4       |                       |
  |                         ----------------                        |
  |                                                                 |
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