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Re: Introduction to URIs (was RE: WebArch introduction, sort of)

From: Roy T. Fielding <fielding@gbiv.com>
Date: Mon, 26 Jan 2009 16:43:14 -0800
Message-Id: <A746398B-B936-4952-B892-3113845B4CC5@gbiv.com>
Cc: W3C TAG <www-tag@w3.org>
To: "Henry S. Thompson" <ht@inf.ed.ac.uk>

>>> From: Henry S. Thompson
>>> . . . .
>>>    _What's a URI and why does it matter?_
>>>      http://www.ltg.ed.ac.uk/~ht/WhatAreURIs/
>>> Feedback welcome,

Hmm, that reminds me ...

   'Representation' names a pair: a character sequence and a media type.

That's too simplified.  A representation is some amount of data and its
associated metadata that represents the state of some resource at a  
point in time [which resource and which point in time is usually  
outside the representation; e.g., in request method semantics, response
message status, and message metadata like the Date header field in  
The media type is only one of many metadata, and there certainly is no
requirement that the data be a "character sequence".  For example, a
JPEG picture of my dog is not a character sequence.

Received on Tuesday, 27 January 2009 00:43:51 UTC

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