W3C home > Mailing lists > Public > public-lod@w3.org > April 2011

Re: Linked Data, Blank Nodes and Graph Names

From: Michael Brunnbauer <brunni@netestate.de>
Date: Fri, 8 Apr 2011 09:11:37 +0200
To: public-lod@w3.org
Message-ID: <20110408071137.GA15366@netestate.de>

re

On Thu, Apr 07, 2011 at 06:45:55PM +0100, Nathan wrote:
> To cut a long story short, blank nodes are a bit of a PITA to work with, 

Yes.

> - would you be happy to give up blank nodes?

No

> - just the [] syntax?

I am not sure if I understand that. I know that syntax from SPARQL and N3.
I see no reason to remove it from SPARQL.

> - do you always have a "name" for your graphs? (for instance when 
> published on the web, the URL you GET, and when in a store, the ?G of 
> the quad?

Not always.

> 4) create a subset of RDF which does have a way of differentiating blank 
> nodes from URI-References, where each blank node is named persistently 
> as something like ( graph-name , _:b1 ),

This seems to be a way of skolemizing using the graph name.

I would prefer a way of skolemizing that does not depend on the graph name
and can be done by producer *and* consumer of RDF on a voluntary base.
It should be a standard with reference implementations in all important
languages for:

-generating a skolem URI
-converting an unskolemized RDF serialization to a skolemized one
-converting a skolemized RDF serialization to an unskolemized one

It is important that skolem URIs would be recognizeable.

Regards,

Michael Brunnbauer

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Received on Friday, 8 April 2011 07:12:02 UTC

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