On May 9, 2008, at 7:02 AM, Julian Reschke wrote:
But not every entity transferred over HTTP is a representation of a
resource. Example: the response body sent with a 404 status.
It is a representation of a 404 response.
<http://www.ics.uci.edu/~fielding/pubs/dissertation/
rest_arch_style.htm#sec_5_2_1_2>
Depending on the message control data, a given representation may
indicate the current state of the requested resource, the desired
state for the requested resource, or the value of some other
resource,
such as a representation of the input data within a client's query
form, or a representation of some error condition for a response.
....Roy