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Re: New blank node scope proposal

From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
Date: Tue, 22 Jan 2013 06:29:20 -0800
Message-ID: <50FEA240.6040909@gmail.com>
To: Pat Hayes <phayes@ihmc.us>
CC: Antoine Zimmermann <antoine.zimmermann@emse.fr>, RDF WG <public-rdf-wg@w3.org>

On 01/21/2013 09:47 PM, Pat Hayes wrote:
> On Jan 21, 2013, at 8:10 AM, Antoine Zimmermann wrote:
>
>> You can find my proposal at:
>>
>> http://www.w3.org/2011/rdf-wg/wiki/User:Azimmerm/Blank-node-scope
> OK, let me pick up on this. Your second sentence is wrong, if it is supposed to be talking about current RDF as defined by the 2004 specs:
>
> "The same blank node can appear in an infinity of RDF graphs and depending on which graph is considered, the blank node may indicate the existence of different things."
>
> In current (2004) RDF, this is not correct. Each blank node is essentially an existential variable with a *global* scope. It is not limited to the particular graph in which it occurs. That is precisely the problem, in fact.
This may be that is intended.   However, I don't see anything in the RDF 
Semantics that enforces it.

[...]

peter
Received on Tuesday, 22 January 2013 14:29:49 GMT

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