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Re: EARL, Typed Node Elements and abbreviated syntax.

From: Shadi Abou-Zahra <shadi@w3.org>
Date: Wed, 9 Mar 2005 11:29:01 +0100
To: <public-wai-ert@w3.org>
Message-ID: <001f01c52492$cfedf1f0$6466a8c0@K2>

Hi,

Seems like a good paragraph for the EARL Primer, with a link to a more
in-depth description in the RDF Primer. For example to
<http://www.w3.org/TR/rdf-primer/#basicconcepts>.

I've recorded this into the EARL Requirements document so that we
remember it when we start editing the EARL Primer.

Regards,
  Shadi


-----Original Message-----
From: public-wai-ert-request@w3.org On Behalf Of Nils Ulltveit-Moe
Sent: Wednesday, March 09, 2005 09:28
To: public-wai-ert@w3.org
Subject: Re: EARL, Typed Node Elements and abbreviated syntax.



Thanks you, Charles

I thought it would be nice for other newcomers to be aware of the fact
that EARL in RDF/XML can have several representations. That puzzled me
at first, especially since there was no examples of the non-abbreviated
EARL syntax on the web. Now there is :-)

Regards,
Nils

tir, 08,.03.2005 kl. 17.46 -0500, skrev Charles McCathieNevile:
> Hi,
> 
> EARL is RDF, and the "abbreviated syntax" is legal RDF equivalent to
the  
> "full syntax". (There are in fact other syntax variations that are  
> possible, but since very few people are generating EARL, and in
particular  
> because so far few people are reading it and then handing on results
they  
> haven't appeared much. Yet.)
> 
> If you want to know which RDF tools can handle RDF you should run them

> against the RDF test suite (or look for EARL results that suggest that
a  
> particular library can handle RDF... Oh. EARL was in its long dark
sleep  
> when the RDF group were testing tools, so they made up their own thing

> instead. I guess it is easy enough to write a convertor).
> 
> The current draft EARL spec uses a number of things, including entity

> declarations, to try and make the syntax slightly more readable. Since
RDF  
> is a) meant for machines, not people, an b) about as readable in any
form  
> it apears in, the version I drafted that actually validates doesn't
use  
> the entity stuff. It means the document is longer, but it relies on
fewer  
> things being implemented in order to achieve interoperability.
> 
> So I think we should point out to developers who don't understand how
RDF  
> works that YES, the two versions (and several others) are equivalent,
and  
> they need to expect that.
> 
> I typically process EARL with CWM, which is happy to accept anything
that  
> in real RDF (and some stuff that isn't) although it generates a
particular  
> serialisation itself. I am prety sure that RAP, Raptor, Redland, Jena
all  
> have no problems dealing with the variety of RDF i it is valid. The  
> ARP-based validator also gets it right, and shows the same graph for
any  
> partiular syntax you feed it.
> 
> Cheers
> 
> Chaals
> 
> On Tue, 08 Mar 2005 16:09:54 -0500, Nils Ulltveit-Moe <nils@u-moe.no>

> wrote:
> 
> >
> > Hi
> >
> > Is the Typed Node Elements and abbreviated XML representation of
EARL
> > regarded as the norm, or is the more verbose rdf:Description XML
> > representation regarded as equivalent?
> 
> > Seen from an RDF perspective, these two representations are
equivalent.
> >> From a human perspective, that seems strange. Especially for
developers
> > who have a superficial knowledge of RDF/XML and only wants to output
the
> > required strings to generate EARL.
> >
> > It would also be nice if the ERT tool register contained a register
of
> > EARL compliant libraries. Especially if EARL tools are required to
be
> > able to parse and then store the abbreviated and typed node syntax.
> 
> 
-- 
Nils Ulltveit-Moe <nils@u-moe.no>
Received on Wednesday, 9 March 2005 10:29:04 GMT

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