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

Sam Ruby rubys at intertwingly.net
Sat Jan 17 16:02:36 PST 2009

On Sat, Jan 17, 2009 at 5:51 PM, Henri Sivonen <hsivonen at iki.fi> wrote:
> 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 context.
>> I would assume no differences in the DOM based on XHTML or HTML.
> The assumption is incorrect.
> Please compare
> http://hsivonen.iki.fi/test/moz/xmlns-dom.html
> and
> http://hsivonen.iki.fi/test/moz/xmlns-dom.xhtml
> Same bytes, different media type.

The W3C Recommendation for DOM also describes a readonly attribute on
Attr named 'name'.  Discuss.

>> 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.

There is a similar inconsistency in how xml:lang is handled.  Discuss.

> --
> Henri Sivonen
> hsivonen at iki.fi
> http://hsivonen.iki.fi/

- Sam Ruby

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