User                  Network Operator
           flow/service  
    /\      info model    +---+ 
   /  \ <---------------> | X |    management/control
   ----                   +-+-+       plane entity
                            ^   
                            |   configuration
                            |     info model
                     +------------+
                     v      |     |
                    +-+     |     v  network
                    +-+     v    +-+  nodes
                           +-+   +-+
                           +-+