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Re: Blank Nodes and SPARQL

From: Eric Prud'hommeaux <eric@w3.org>
Date: Mon, 11 Jul 2005 14:10:22 -0400
To: Ron Alford <ronwalf@umd.edu>
Cc: "Seaborne, Andy" <andy.seaborne@hp.com>, Dan Connolly <connolly@w3.org>, public-rdf-dawg-comments@w3.org, Amy Alford <aloomis@glue.umd.edu>
Message-ID: <20050711181022.GA12390@w3.org>
On Sun, Jul 10, 2005 at 10:04:19PM -0400, Ron Alford wrote:
> 
> After consulting with the lab, we have decided that the namespace
> splitting proposal (_!:...) is the best way to deal with the use cases
> that have been brought up.

Given that the grammar does not assign any conflicting meaning to
_!:..., would postponing this to SPARQL 2 acceptable?

Before you answer, allow me to lead the question a little: none of the
query languages we surveyed have this capability.

> While we believe that the protocol prebinding is nice and generally
> useful, we would prefer a syntax level solution to the bnode problem.
> 
> The function extension (ext:bnodelabel) comes in a distant third.  It
> adds annoying overhead to templating queries.  We were also concerned
> with how well implementations will deal with function extensions.
> 
> So I drop my original comment suggestions in favor of either namespace
> splitting or prebinding.  The function extensions have yet to convince
> me, but there's still room.
> 
> 
> Finally, I'd like to thank Amy Alford, Kendall Clark, and Bijan Parsia
> for all their help and input into this issue.  I'd also like to thank
> the members of the dawg who've been so responsive to this issue both on
> the list and in IRC.
> 
> -Ron



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-eric

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Received on Monday, 11 July 2005 18:10:28 GMT

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