Core.HiddenElements TYPE: lookup --DEFAULT-- array ( 'script' => true, 'style' => true, ) --DESCRIPTION--
  This directive is a lookup array of elements which should have their
  contents removed when they are not allowed by the HTML definition.
  For example, the contents of a script tag are not
  normally shown in a document, so if script tags are to be removed,
  their contents should be removed to. This is opposed to a b
  tag, which defines some presentational changes but does not hide its
  contents.