+--rw vpn-services
        +--rw vpn-service* [vpn-id]
           +--rw vpn-id                        vpn-common:vpn-id
           +--rw vpn-name?                     string
           +--rw vpn-description?              string
           +--rw customer-name?                string
           +--rw parent-service-id?            vpn-common:vpn-id
           +--rw vpn-type?                     identityref
           +--rw vpn-service-topology?         identityref
           +--rw bgp-ad-enabled?               boolean
           +--rw signaling-type?               identityref
           +--rw global-parameters-profiles
           |  ...
           +--rw underlay-transport
           |  +--rw (type)?
           |     +--:(abstract)
           |     |  +--rw transport-instance-id?   string
           |     |  +--rw instance-type?           identityref
           |     +--:(protocol)
           |        +--rw protocol*                identityref
           +--rw status
           |  +--rw admin-status
           |  |  +--rw status?         identityref
           |  |  +--rw last-change?   yang:date-and-time
           |  +--ro oper-status
           |     +--ro status?         identityref
           |     +--ro last-change?   yang:date-and-time
           +--rw vpn-nodes
              ...