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Re: ISSUE-57: The use of HTTP Redirection

From: Tim Berners-Lee <timbl@w3.org>
Date: Fri, 31 Aug 2007 10:06:10 -0400
Message-Id: <968404D5-9EBB-414B-9268-97EB473C4355@w3.org>
Cc: Ed Davies <edavies@nildram.co.uk>, Technical Architecture Group WG <www-tag@w3.org>
To: Pat Hayes <phayes@ihmc.us>


On 2007-08 -30, at 19:16, Pat Hayes wrote:

>
>> Richard Cyganiak wrote:
>>> 2. This boils down to a question wether to provide a  
>>> representation of a resource, or instead provide an associated  
>>> description of the resource (by means of a 303 redirect or hash  
>>> truncation). What is the  difference between a representation and  
>>> a description?
>>
>> A representation _is_ the thing (to some not quite fully
>> defined level of approximation)
>
> I really hope you are wrong about this. If you aren't, then  
> everything written about the nature of representation for the past,  
> say, 100 years, has been mistaken.

We are using 'representation' in a specific sense, different from the  
various english senses with which it may or not have been used.   It  
is a relationship used in web architecture, which not been discussed  
in th last 100 years a lot.

> One of the most basic assumptions of just about everyone who has  
> written anything on semiotics or semantics is that the  
> representation of something is distinct from the thing represented.  
> Korzybski summed it up in a famous maxim of 'general semantics':  
> "the map is not the territory".
>

This is true if the web arch sense of representation, but it is NOT  
used for the relationship between the territory and the map, but  
between the map and a Representation (a pair of some metadata and a  
sequence of bits).

[...]
> The REST theory uses 'representation' in a special, highly  
> restricted, way: but even so, it is careful to distinguish the  
> resource itself (eg a web page) from its various representations  
> (what you get sent when you do a GET on that page's URI)

Exactly.
Tim

>
> Pat Hayes
Received on Friday, 31 August 2007 14:06:23 GMT

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