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A new HTTP response code say 209

From: Tim Berners-Lee <timbl@w3.org>
Date: Thu, 19 Dec 2013 11:55:58 -0500
Message-Id: <87126BAE-C6EE-4887-92AB-8B6A0745790D@w3.org>
Cc: Mark Nottingham <mnot@mnot.net>, Yves Lafon <ylafon@w3.org>, "plh@w3.org Le Hegaret" <plh@w3.org>, Peter Linss <peter.linss@hp.com>, "Appelquist Daniel (UK)" <Daniel.Appelquist@telefonica.com>
To: TAG List <www-tag@w3.org>, Arnaud Hors <lehors@us.ibm.com>, Eric Prud'hommeaux <eric@w3.org>


We need a new 20X status code (we refer to it as 209, though that can be regarded as a placeholder) to allow information relating to and useful but different from the original thing.

209 could be deemed to be definitely equivalent  equivalent to 303 "see also" to another URI which gives 200.  The Location: y   header from the 303 would be the same as the one used in the 209 to identify the URI of the meta resource.

The fact that existing LD systems use 303 and LDP systems are thinking of it is a serious architectural problem as the extra round trips.

The payload is machine readable in each case I am interested in.

Example uses:

- You asked for massive data, I give you instructions for doing a query for a part of it
- You asked for a large thing, this is the first page of it.  See Proposal [1]
- You asked for some thing with URI u, I give you a document about it which has a different URI. Classic linked data use case see eg [2]

Possible process paths:

- Just define 209 in the spec, as an unauthorized extension of HTTP.  People do this with headers and HTML tags all the time.  Do this with IESG blessing.   This may not be deemed an appropriate process with in the IETF which has change control.

- Start an IETF effort to define 209 from the ground up, ASAP.  Problems: the LDP working group's lack of confidence that the process would be timely and would not be waylaid by people who did not have/understand the needs of the linked data community.

- Reserve the 209 code with a an internet draft -- and then code it into current code, then other of the 

- Etc ...  many other combinations

Can we discuss this at the next call?
Sorry about the short notice.

Timbl

Tim

[1] http://www.w3.org/2012/ldp/wiki/Meetings:Telecon2013.11.04#Proposals_regarding_Paging_.26_209_vs_200

[2] http://linkeddatabook.com/editions/1.0/#htoc12







Received on Thursday, 19 December 2013 16:56:03 UTC

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