rd render-kit for
 this parameter include any valid "Accept header style" String that includes the String <code>text/html</code>,
 <code>application/xhtml+xml</code>, <code>application/xml</code> or <code>text/xml</code>. This may change in a
 future version. The RenderKit must support a value for this argument that comes straight from the <code>Accept</code>
 HTTP header, and therefore requires parsing according to the specification of the <code>Accept</code> header. Please
 see <a href="http://www.ietf.or