text: #ifndef INCLUDE_ACKWARD_UUID_VARIANT_HPP
  #define INCLUDE_ACKWARD_UUID_VARIANT_HPP
  
  namespace ackward {
  namespace uuid {
  
  /** These represent the various internal layouts of a UUID.
   */
  enum Variant
  {
      RESERVED_NCS, 
      RFC_4122, 
      RESERVED_MICROSOFT, 
      RESERVED_FUTURE
  };
  
  } // namespace uuid
  } // namespace ackward
  
  #endif
  