ot;:&quot; hier-part [ &quot;?&quot; query ] [ &quot;#&quot; fragment ]
  &#47;&#47;
  &#47;&#47; hier-part     = &quot;&#47;&#47;&quot; authority path-abempty
  &#47;&#47;               &#47; path-absolute
  &#47;&#47;               &#47; path-rootless
  &#47;&#47;               &#47; path-empty
  &#47;&#47;
  &#47;&#47; URI-reference = URI &#47; relative-ref
  &#47;&#47;
  &#47;&#47; absolute-URI  = scheme &quot;:&quot; hier-part [ &quot;?&quot; query ]
  &#47;&#47;
  &#47;&#47; relative-ref  = relative-p