array (
  'bool' => 
  array (
    'must_not' => 
    array (
      0 => 
      array (
        'term' => 
        array (
          'customertype' => 'DM',
        ),
      ),
      1 => 
      array (
        'term' => 
        array (
          'customertype' => 'RD',
        ),
      ),
    ),
  ),
)array (
  'bool' => 
  array (
    'must' => 
    array (
      0 => 
      array (
        'exists' => 
        array (
          'field' => 'location',
        ),
      ),
    ),
  ),
)