module org-open-road-m-device {
    namespace "http://org/openroadm/device";
    prefix org-open-road-m-device;

    identity syslog-facility {
        description
            "The base identity to represent syslog facilities";
    }

    identity syslog-usability {
        description
            "The base identity to represent syslog usabilities";
    }

    identity syslog-availability {
        description
            "The base identity to represent syslog availabilities";
    }

    typedef value {
        type identityref {
            base syslog-availability;
        }
    }

    typedef correct {
        type union {
            type union {
                type identityref {
                    base syslog-availability;
                }
                type value;
            }
            type identityref {
                base syslog-usability;
            }
        }
    }

    grouping device-common {
        leaf facility {
            type union {
               type union {
                   type union {
                       type identityref {
                           base syslog-usability;
                       }
                       type correct;
                   }
                   type identityref {
                       base syslog-facility;
                   }
               }
               type value;
            }
        }
        container network-ref {
            leaf-list facility {
                type union {
                   type union {
                       type union {
                           type identityref {
                               base syslog-usability;
                           }
                           type correct;
                       }
                       type identityref {
                           base syslog-facility;
                       }
                   }
                   type value;
                }
            }
        }
    }

    list node {
        config false;
        uses device-common;
    }
}