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Re: RDF Concepts - What is a Node?

From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
Date: Tue, 29 May 2012 14:58:00 -0400
Message-ID: <4FC51C38.7030103@gmail.com>
To: Pat Hayes <phayes@ihmc.us>
CC: Richard Cyganiak <richard@cyganiak.de>, nathan@webr3.org, RDF WG <public-rdf-wg@w3.org>, David Wood <david@3roundstones.com>


On 05/29/2012 02:22 PM, Pat Hayes wrote:
> On May 28, 2012, at 8:15 PM, Peter F. Patel-Schneider wrote:
>
>>
>> On 05/28/2012 01:41 PM, Richard Cyganiak wrote:
>>> Hi Nathan,
>>>
>>> On 28 May 2012, at 17:02, Nathan wrote:
>>>> Generally we see an RDF Graph as a Set of Statements, and the meaning of that is the conjunction of all the Statements in the Graph; and where each Graph entails its powerset.
>>> Yes.
>>>
>>>> However, it seems like there is an unwritten assumption in the community, that the meaning of a Node within a Graph is the conjunction of all the statements made where that node is in the subject or object position.
>>> Nodes in an RDF graph don't have meaning.
>> I beg to differ!
>>
>> peter
> Phrases involving the word "meaning" are very slippery, and y'all may have noticed that the semantics avoids that word like the plague. What is true is that a node, alone, asserts no facts, cannot be said to be true or false, expresses no propositions. Whereas a triple or a graph does all these things.
>
> I think also that we all, even Peter, agree that Nathans' idea, that a node represents a conjunction of statements, is wrong.
>
> Pat

Absitively!

peter
Received on Tuesday, 29 May 2012 18:58:32 GMT

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