W3C home > Mailing lists > Public > www-tag@w3.org > December 2008

Re: link relationship registration

From: Anne van Kesteren <annevk@opera.com>
Date: Wed, 10 Dec 2008 13:09:20 +0100
To: "Phil Archer" <phil@philarcher.org>
Cc: "Mark Nottingham" <mnot@mnot.net>, "ietf-http-wg@w3.org Group" <ietf-http-wg@w3.org>, "Atom Syntax" <atom-syntax@imc.org>, www-tag@w3.org, "HTML WG" <public-html@w3.org>
Message-ID: <op.ulx31ufq64w2qv@annevk-t60.oslo.opera.com>

On Wed, 10 Dec 2008 12:50:09 +0100, Phil Archer <phil@philarcher.org>  
> Anne van Kesteren wrote:
>>  Also, I definitely do not want to start having to implement support  
>> for http://www.iana.org/assignments/relation/stylesheet besides just  
>> stylesheet. (Not for the Link HTTP header or for the HTML elements.)  
>> That's just additional complexity for no gain and will only lead to  
>> bugs and differences among browsers.
> There shouldn't be any need for UAs to resolve tokens given as values  
> for @rel as absolute URIs and no one's suggesting that UAs should  
> actually make an HTTP request of any kind to iana.org every time there's  
> a link to a stylesheet. It's the person minting the new relationship  
> type that needs to check. What it means is that if you create a link  
> (HTML or HTTP) and use a @rel type 'foo' that gives a 404 from  
> http://www.iana.org/assignments/relation/foo then you really shouldn't  
> expect UAs to do anything sensible with it.
> Whether a UA chooses to actually implement support for a registered @rel  
> type remains very much up to the UA developer of course.

The concern is that besides supporting stylesheet (and it's case variants)  
we'd also have to support  
http://www.iana.org/assignments/relation/stylesheet meaning the same  
thing. And thus also http://www.iana.org/assignments/relation/alternate  
and the special behavior you get when both (stylesheet and alternate) are  
specified. We can map http://www.iana.org/assignments/relation/stylesheet  
to stylesheet and such first, but I don't think adding another layer of  
complexity is justified.

(I'm not at all concerned about UAs having to fetch such URIs, as any such  
proposal would be stillborn.)

Anne van Kesteren
Received on Wednesday, 10 December 2008 12:16:00 UTC

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