W3C home > Mailing lists > Public > public-html@w3.org > January 2010

Re: <iframe doc="">

From: Henri Sivonen <hsivonen@iki.fi>
Date: Mon, 18 Jan 2010 12:36:38 +0200
Message-Id: <EE0423C7-FC32-4DD8-A6F2-527E070326A6@iki.fi>
To: "public-html@w3.org WG" <public-html@w3.org>
On Jan 15, 2010, at 04:26, Ian Hickson wrote:

> * Have doc="" in XML documents (and DOM-created documents that aren't 
> flagged as an "HTML document") be parsed as XML. This has the advantage of 
> being unsurprising.

Is it really unsurprising? I'd extrapolate from innerHTML that it's bad for stuff you can script via the DOM to change behavior depending on the HTMLness bit of the Document object. It's bad that you have to revise innerHTML access in the bowels of a JS library if you want to use the library with XHTML.

As a general principle, I think new stuff that depends on the HTMLness bit shouldn't be introduced.

> * Have doc="" in all documents always be parsed as text/html. This would 
> mean that you couldn't implement an XML-only HTML UA, which I think would 
> be unfortunate.

Shouldn't XML-only UAs fall into the theoretical purity bucket for the purposes of the Design Principles?

> * Have some sort of selector, so you could embed HTML in XML and XML in 
> HTML. It's not clear what the use case for this is, and it has the same 
> disadvantage as the previous one -- it would mean that implementations 
> would always be required to implement both text/html and XML, which we've 
> so far avoided.

If you have html='...' and xml='...' attributes, you could say that an HTML-only UA isn't required to implement xml='...' and an XHTML-only UA isn't required to implement html='...'. Such non-requirements would be equally impractical as loading HTML in an iframe in an XHTML-only UA or vice versa with the spec as it stands today.

On Jan 16, 2010, at 11:39, Julian Reschke wrote:

> I thought markup in attributes was a super-anti-pattern.

It is, but it seems it's the safest way to hack in-file sandboxes into HTML. :-(

Henri Sivonen
Received on Monday, 18 January 2010 10:37:17 UTC

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