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RE: G(RDDL)

From: Dan Connolly <connolly@w3.org>
Date: Thu, 09 Mar 2006 16:19:35 -0600
To: Misha Wolf <Misha.Wolf@reuters.com>
Cc: www-tag@w3.org, public-rdf-in-xhtml-tf@w3.org, newsml-2@yahoogroups.com
Message-Id: <1141942775.26363.1584.camel@dirk.w3.org>

On Thu, 2006-03-09 at 21:59 +0000, Misha Wolf wrote:
> On 9 March, Dan wrote:
> > 
> > On Thu, 2006-03-09 at 18:39 +0000, Misha Wolf wrote:
> > [...]
> > > I'm not sure whether we are misunderstanding each other or 
> > > whether I am misunderstanding the GRDDL document [1].  The 
> > > document is very terse, and I may be missing some context.  
> > > Please clarify how one would construct a human-readable 
> > > RDDL document containing links to GRDDL transform(s), among 
> > > other resources.
> > 
> > OK, I'll try to dig out my RDDL/GRDDL stuff and make an example.
> > 
> > Meanwhile, this is supposed to be covered in a section of
> > a TAG finding in progress... oh... you already foud it[2].
> > 
> > Section 3.3 "Using GRDDL" doesn't answer your questions?
> > http://www.w3.org/2001/tag/doc/nsDocuments/#div.grddl
> 
> Either that draft TAG finding is broken or I'm missing something.
> 
> > Then perhaps we do need another example.
> 
> I don't think that another example will fix it.  There seems 
> to be a conceptual gap here.  Why does the finding have a 
> section called "3.3 Using GRDDL", which starts  with: 
> "A third approach is to use [GRDDL]"?
>    ^^^^^
> Why is this a separate "approach"?

That strikes me as odd too, now that I look at it.

I guess the point is: you're encouraged to put information so
that people can look up namespaces in the Web. It's good to
have both machine readable and human-readable information there.
RDDL 1.x is one known way to do it. Some folks like RDDL 2.x
better. GRDDL also does the trick.

The finding doesn't (yet) explicitly cover the fact that RDDL documents
can also be GRDDL documents.

>   Why doesn't the finding 
> simply offer a Purpose such as "Serves the purpose of conversion 
> to RDF/XML"?
>
> > To give a link from a namespace to a transformation
> > for documents that use that namespace, GRDDL coins
> > this URI:
> >  http://www.w3.org/2003/g/data-view#namespaceTransformation
> 
> So why isn't this included in the list of Purposes in the draft 
> finding?

Good question. That list of purposes is sorta odd.
We're having trouble finding the end of it.
In some sense, every RDF property URI is a perfectly
good Purpose; clearly we can't list them all, but
if we're going to list the RDDL ones, we might
as well list the GRDDL ones too.

> > GRDDL also coins 2 other URIs that can be used as RDDL
> > purposes:
> >  http://www.w3.org/2003/g/data-view#transformation
> >  http://www.w3.org/2003/g/data-view#profileTransformation
> 
> Ditto.
> 
> > > [1] http://www.w3.org/2004/01/rdxh/spec
> > > [2] http://www.w3.org/2001/tag/doc/nsDocuments/

-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/
D3C2 887B 0F92 6005 C541  0875 0F91 96DE 6E52 C29E
Received on Thursday, 9 March 2006 22:19:44 GMT

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