$rDef = {
  'geom' => 1,
  'balloon' => 1,
  'attr' => {
    '-bigincrement' => 'int+',
    '-foreground' => 'color',
    '-sliderlength' => 'int+',
    '-digits' => 'int+',
    '-borderwidth' => 'int+',
    '-relief' => 'relief',
    '-variable' => 'text',
    '-to' => 'float',
    '-length' => 'int+',
    '-background' => 'color',
    '-label' => 'text',
    '-orient' => 'menu(vertical|horizontal)',
    '-command' => 'callback',
    '-width' => 'int+',
    '-state' => 'menu(normal|active|disabled)',
    '-showvalue' => 'menu(1|0)',
    '-resolution' => 'float',
    '-from' => 'float',
    '-troughcolor' => 'color',
    '-tickinterval' => 'int+'
  }
};
