+--rw specific-provisioning-profiles
  |  ...
  +--rw service-provisioning-profiles
  |  ...
  +--rw attachment-circuits
     +--rw ac-group-profile* [name]
     |  ...
     +--rw placement-constraints
     |  ...
     +--rw ac* [name]
        ...
        +--rw name                 string
        +--rw l2-connection  {ac-common:layer2-ac}?
        |  +--rw encapsulation
        |  |  +--rw type?              identityref
        |  |  +--rw dot1q
        |  |  |  +--rw tag-type?   identityref
        |  |  |  +--rw cvlan-id?   uint16
        |  |  +--rw priority-tagged
        |  |  |  +--rw tag-type?   identityref
        |  |  +--rw qinq
        |  |     +--rw tag-type?   identityref
        |  |     +--rw svlan-id?   uint16
        |  |     +--rw cvlan-id?   uint16
        |  +--rw (l2-service)?
        |  |  +--:(l2-tunnel-service)
        |  |  |  +--rw l2-tunnel-service
        |  |  |     +--rw type?         identityref
        |  |  |     +--rw pseudowire
        |  |  |     |  +--rw vcid?      uint32
        |  |  |     |  +--rw far-end?   union
        |  |  |     +--rw vpls
        |  |  |     |  +--rw vcid?      uint32
        |  |  |     |  +--rw far-end*   union
        |  |  |     +--rw vxlan
        |  |  |        +--rw vni-id?            uint32
        |  |  |        +--rw peer-mode?         identityref
        |  |  |        +--rw peer-ip-address*   inet:ip-address
        |  |  +--:(l2vpn)
        |  |     +--rw l2vpn-id?            vpn-common:vpn-id
        |  +--rw bearer-reference?          string
        |          {vpn-common:bearer-reference}?
        +--rw ip-connection  {ac-common:layer3-ac}?
        |  ...
        +--rw routing-protocols
        |  ...
        +--rw oam
        |  ...
        +--rw security
        |  ...
        +--rw service
           ...