dentifier (URI): Generic Syntax&quot;">RFC3986</a>]).  The history of these status
   codes is summarized in <a href="./rfc7231#section-6.4">Section&nbsp;6.4 of [RFC7231]</a>, which also
   classifies the existing status codes into four categories.

   The first of these categories contains the status codes 301 (Moved
   Permanently), 302 (Found), and 307 (Temporary Redirect), which can be
   classified as below:

   +-------------------------------------------+-----------+-----------+
   |                 