[uf-discuss] RFC: sHTML Video Thumbnailing

Maciej Stachowiak mjs at apple.com
Mon May 28 03:19:21 PDT 2007

On May 27, 2007, at 6:55 PM, Paul Wilkins wrote:

> http://www.w3.org/TR/html401/struct/links.html#h-12.1.2
> My simplified understanding of the relationship between rel and rev is
> With the rel attribute, the relationship that the linked page has  
> to this link is "foo".
> With the rev attribute, the relationship that this link has from  
> the linked page is "foo".

Actually, I think that's exactly backwards. But that's part of the  
reason rev is so confusing.

> Use "previous" or "next" as the link values and you'll understand  
> what's going on.

<link rel="next"> should point to the logically "next" document, so  
the linked resource's relationship to the current resource is that it  
is "next".

What you describe below seems to reflect the same understanding  
though, so maybe we just disagree on the wording.

> From: "Patrick H. Lauke" <redux at splintered.co.uk>
>> Charles Iliya Krempeaux wrote:
>>>> <a rev="thumbnail" href="http://example.com/video">
>>>>    <img src="http://example.com/thumbnail.jpg">
>>>> </a>
>>> I'm not sure if the "rev" attribute is being used correctly in  
>>> your markup.
>> Rev defines the reverse link to the current document, not to  
>> whatever is encapsulated by the link itself...unless I'm reading  
>> the spec wrong
>> "This attribute describes the relationship from the current  
>> document to the anchor specified by the href attribute"
>> http://www.w3.org/TR/html401/struct/links.html#edef-A
> A rel link from the video page to the thumbnail would be "thumbnail".
> So, a rev link on the thumbnail to the video page would also be  
> "thumbnail".
> I've got no problem with using rel and rev values myself, but if  
> you're going to use a a custom link-type that's not actually  
> defined in http://www.w3.org/TR/html401/types.html#type-links then  
> you should use a profile to define what's going on.

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