[whatwg] RDFa is to structured data, like canvas is to bitmap and SVG is to vector

Henri Sivonen hsivonen at iki.fi
Sat Jan 17 14:51:18 PST 2009

On Jan 17, 2009, at 22:35, Shelley Powers wrote:

> Generally, though, RDFa is based on reusing a set of attributes  
> already existing in HTML5, and adding a few more.

Also, RDFa uses CURIEs which in turn use the XML namespace mapping  

> I would assume no differences in the DOM based on XHTML or HTML.

The assumption is incorrect.

Please compare

Same bytes, different media type.

> I put together a very crude demonstration of JavaScript access of a  
> specific RDFa attribute, about. It's temporary, but if you go to my  
> main web page,http://realtech.burningbird.net, and look in the  
> sidebar for the click me text, it will traverse each div element  
> looking for an "about" attribute, and then pop up an alert with the  
> value of the attribute. I would use console rather than alert, but I  
> don't believe all browsers support console, yet.

This misses the point, because the inconsistency is with attributes  
named xmlns:foo.

Henri Sivonen
hsivonen at iki.fi

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