YANG模型中leaf type 为identityref,xml中如何为leaf 赋值。

YANG model leaf:

leaf type {
        type identityref {
          base interface-type;
        }
        mandatory true;
        description
          "The type of the interface.
           When an interface entry is created, a server MAY
           initialize the type leaf with a valid value, e.g., if it
           is possible to derive the type from the name of the
           interface.
           If a client tries to set the type of an interface to a
           value that can never be used by the system, e.g., if the
           type is not supported or if the type does not match the
           name of the interface, the server MUST reject the request.
           A NETCONF server MUST reply with an rpc-error with the
           error-tag 'invalid-value' in this case.";
        reference
          "RFC 2863: The Interfaces Group MIB - ifType";
      }

---------------------------------------------------------------------------------------------------------------

/*
   * Identities
   */

  identity interface-type {
    description
      "Base identity from which specific interface types are
       derived.";
  }

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