W3C home > Mailing lists > Public > public-html@w3.org > May 2007

Re: Applicable elements for predefined classnames

From: Dão Gottwald <dao@design-noir.de>
Date: Thu, 10 May 2007 13:18:10 +0200
Message-ID: <4642FF72.1070409@design-noir.de>
To: Rene Saarsoo <nene@triin.net>
CC: public-html@w3.org

Rene Saarsoo schrieb:
> 
> I wrote:
>>> Similarly authors can make up their own element <foo>, which
>>> might be assigned a meaning in some future spec of HTML.
>>> But usually there is no benefit in making up your own elements,
>>> and people rarely do it. Similarly do they rarely come up with new
>>> values for other attributes with predefined sets of values.
>>> Why should it be the case with @role?
> 
> Matthew Raymond wrote:
>> I don't think that's the case. While people don't commonly invent new
>> elements, they use all sorts of arbitrary values for the |rel|
>> attribute, especially for microformats.
> 
> This is quite different from making up your own class names.
> If I make up my own class name, there is direct benefit -
> I can use it in my CSS file as a class selector.
> 
> When I make up my own @rel value, there is no benefit at all.
> Only when there exists some technology, that makes use of
> this new @rel value, then will people start using it.

You don't need a third-party technology. Analogous to class, you can use 
client-side scripts and CSS. I'm actually doing that on two sites:

a[rel~=extern]:after {
	content: "\2005" url(link_ext.png);
	white-space: nowrap;
	opacity: .7;
}

--Dao
Received on Thursday, 10 May 2007 11:18:19 UTC

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