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Re: GRDDL and HTML5

From: Ian Hickson <ian@hixie.ch>
Date: Mon, 25 Aug 2008 20:12:46 +0000 (UTC)
To: Julian Reschke <julian.reschke@gmx.de>
Cc: Harry Halpin <hhalpin@ibiblio.org>, Danny Ayers <danny.ayers@gmail.com>, Dan Connolly <connolly@w3.org>, "Booth, David (HP Software - Boston)" <dbooth@hp.com>, "public-grddl-comments@w3.org" <public-grddl-comments@w3.org>
Message-ID: <Pine.LNX.4.62.0808252009350.7044@hixie.dreamhostps.com>

On Mon, 25 Aug 2008, Julian Reschke wrote:
> > 
> > I think that declaring metadata vocabularies is a bad idea regardless 
> > of the syntax. However, the <link rel=""> feature is explicitly 
> > intended as an extension point for people who want to do whatever they 
> > want to do, so
> 
> So is head/@profile.

No, <head profile> is intended to be an opaque identifier declaring that a 
vocabulary is in use. HTML4 doesn't justify dereferencing it for computer 
processing purposes, and doesn't even allow more than one URI. It's not an 
extension point, it has a defined meaning.


> > from an HTML5 perspective it's fine. The profile="" attribute is worse 
> > because it encourages other people to make the same design mistake, 
> > and it
> 
> Which design mistake?

The one I immediately described:

> > misleads people into thinking that they have to declare their vocabularies,
> > and it misleads people into thinking that other people will declare their
> > vocabularies.
> 
> I think it's a good design to declare a vocabulary.

I understand that you think that.


> > > Yes, that would be true, but you'd have to explicitly add it to your 
> > > list of GRDDL transformations. Which is also work.
> > 
> > It's work you will have to do anyway, since not all microChemistry 
> > users will label their documents as using microChemistry.
> 
> How do you know that?

Users have not used profile="" for any of the other vocabularies on any 
sort of consistent basis, so there's no reason to think they'd do anything 
different for new vocabularies.


> > It's also only work for the GRDDL users who care about microChemistry, 
> > which is likely less than the number of microChemistry users.
> > 
> > > So, for agents when encountering a profile that has a transformation 
> > > that is not locally cached, they could "dynamically" run the GRDDL 
> > > tranformation by going to the profile page.
> > 
> > Only if the profile page declares the GRDDL transformation, which is 
> > unlikely in practice.
> 
> Why is that unlikely?

Based on the existing profiles, it hardly ever happens. It seems 
reasonable to extrapolate that this will continue to not happen much.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Monday, 25 August 2008 20:13:05 UTC

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