/usr/share/metview/etc/MHovmoellerViewDef is in metview-data 4.8.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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{
   TYPE
   {
      LINE_HOVM
      AREA_HOVM
      VERTICAL_HOVM
   } = LINE_HOVM
   LINE [
          help         = help_input,
          help_icon    = 'help_line',
          input_type   = line,
          input_window = '/System/Defaults/Input Window'
        ]
   {
      *
      /
   } = 0./-180./0./180.
   AREA [
          help         = help_input,
          help_icon    = 'help_map',
          input_type   = area,
          input_window = '/System/Defaults/Input Window'
        ]
   {
      *
      /
   } = 30./-30./-30./30.
   AVERAGE_DIRECTION
   {
      EAST_WEST
      NORTH_SOUTH
   } = EAST_WEST
   DATE_MIN
   {
      AUTOMATIC
      @
   } = AUTOMATIC
   DATE_MAX
   {
      AUTOMATIC
      @
   } = AUTOMATIC
   BOTTOM_LEVEL
   {
       *
   } = 1015.0
   TOP_LEVEL
   {
       *
   } = 0.01
   SWAP_AXES
   {
      NO
      YES
   } = NO
   RESOLUTION
   {
      *
   } = 1.0
   TIME_AXIS [
               interface       = icon,
               class           = MAXIS,
               missing         = ignored,
               help            = help_data,
               help_name       = Time Axis,
               help_directory  = '/System/Defaults',
               help_class      = MAXIS,
               help_definition = ( MAXIS, AXIS_TYPE=DATE )
             ]
   {
      @
   }
   GEO_AXIS [
              interface       = icon,
              class           = MAXIS,
              missing         = ignored,
              help            = help_data,
              help_name       = Geo Axis,
              help_directory  = '/System/Defaults',
              help_class      = MAXIS,
              help_definition = ( MAXIS, AXIS_ORIENTATION=VERTICAL, AXIS_TICK_LABEL_TYPE=LATITUDE )
            ]
   {
      @
   }
   VERTICAL_AXIS [
                 interface       = icon,
                 class           = MAXIS,
                 missing         = ignored,
                 help            = help_data,
                 help_name       = Vertical Axis,
                 help_directory  = '/System/Defaults',
                 help_class      = MAXIS,
                 help_definition = ( MAXIS, AXIS_ORIENTATION=VERTICAL )
               ]
   {
      @
   }
   VERTICAL_LEVEL_TYPE
   {
      AS_IN_DATA
      PRESSURE
   } = AS_IN_DATA
   VERTICAL_SCALING
   {
      LINEAR
      LOG
   } = LINEAR
   SUBPAGE_CLIPPING
   {
      ON
      OFF
   } = OFF
   SUBPAGE_X_POSITION
   {
      @
   } = 12
   SUBPAGE_Y_POSITION
   {
      @
   } = 10
   SUBPAGE_X_LENGTH
   {
      @
   } = 75
   SUBPAGE_Y_LENGTH
   {
      @
   } = 80
%include PageFrameDef
%include SubpageFrameDef
}
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