/**
   * This Policy will provide application server developers with portable 
   * simplified ObjectGroupManagement semantics.
   * 
   * ObjectGroupMembershipPolicy values:
   *
   * 1. AUTO_ORB_CTRL - The objects created on the POA will be 
   *    automatically FT replicated across all similar server processes (i.e. 
   *    that have a matching FT POA hierarchy). The behaviour from the users 
   *    perspective is 'AUTO' (see below) but the mechanism used by 
   *    the server side ORB to ensure this is left to the ORB implementation.
   *
   *    NOTA: Only valid on POAs with LifespanPolicy 'PERSISTENT' and 
   *          IdAssignmentPolicy 'USER_ID'.
   *          All POA operations that create object references will return 
   *          references that refer to the whole object group rather than to 
   *          this individual member. 
   * 
   * 2. AUTO_OBJ_GRP_MNGR - The objects created on the POA 
   *    will automatically FT replicated as above and as per the behaviour below. 
   *    The POA will use the relevant ObjectGroupManager operations to ensure that 
   *    this is achieved. At the point that a reference is created on the POA 
   *    (and before the reference is returned to the user code) the POA should 
   *    make use of appropriate GOA / ObjectGroupManager operations to:
   *        1. Get the group to which this object should belong
   *        2. Add the member to it.
   *        3. Return the new IOGR to the caller of the POA op. 
   *
   *    NOTA: Only valid on POAs with IdAssignmentPolicy USER_ID.
   *          All POA operations that create object references will return 
   *          references that refer to the whole object group rather than to this 
   *          individual member.  
   *    NOTA: To retrieve the object group reference, compliant POAs should first 
   *          use the object group Locator, and if no Locator is present, it shall 
   *          attempt the NameService.
   *          Compliant ORBs / FT implementations should make this the Object Group 
   *          Locator available to the POA by 
   *          ORB::resolve_initial_references ("FTObjectGroupLocator"). 
   *
   * 3. USER_CTRL_OBJ_GRP_MNGR - The POA created with this policy will 
   *    be a GOA. 
   *    This will make the GOA object group management operations available. 
   *    The interaction with the FT infrastructure will be via the 
   *    ObjectGroupManager as per the already existing spec. 
   *
   * Compliant ORBs / FT implementations should make the ObjectGroupManager 
   * available to the Object Adapter by 
   * ORB::resolve_initial_references ("FTObjectGroupManager").
   */
  enum ObjectGroupMembershipPolicyValue
  {
    AUTO_ORB_CTRL,
    AUTO_OBJ_GRP_MNGR,
    USER_CTRL_OBJ_GRP_MNGR
  };
  
  local interface ObjectGroupMembershipPolicy : CORBA::Policy
  {
    readonly attribute ObjectGroupMembershipPolicyValue value;
  };