- From: Antoine Zimmermann <antoine.zimmermann@emse.fr>
- Date: Fri, 16 Dec 2022 19:24:16 +0100
- To: "Peter F. Patel-Schneider" <pfpschneider@gmail.com>, public-rdf-star-wg@w3.org
Peter, Le 16/12/2022 à 17:21, Peter F. Patel-Schneider a écrit : > [skip] > > > Blank nodes absolutely do denote, just like global existential variables > denote. It is just that what they denote is in some sense less > determined than what IRIs denote. You're using "denote" in a different way as I do, and it is not clear how. I am using the standard RDF 1.1 Semantics (quote Section 4): "The words *denotes* and *refers to* are used interchangeably as synonyms for the relationship between an IRI or literal and what it refers to in a given interpretation, itself called the *denotation* or *referent*." Blank nodes do not denote in this sense. Regardless, the point is that when Pierre-Antoine says "bnodes mean the same everywhere", it is odd, considering how the semantics of bnodes is defined. --AZ > > peter > > > > On 12/16/22 09:10, Antoine Zimmermann wrote: >> >> >> Le 16/12/2022 à 12:58, Pierre-Antoine Champin a écrit : >> >> that means the same everywhere. >> > just like an IRI, a literal or a blank node means the same >> everywhere (mind you, I'm talking about blank nodes, not blank node >> identifiers, who have a local scope). >> >> What do you mean by "a blank node means the same everywhere"? >> Literals and IRIs denote the same thing everywhere, yes. Conversely, >> bnodes do not denote anything. Bnodes only indicate the existence of >> things, and what thing exists as indicated by a bnode depends on the >> RDF graph being considered. >> >> It happens that the CG report interprets quoted triples as bnodes >> whose identity depends on the RDF-star graph being considered. So if >> you consider different RDF-star graphs containing the same quoted >> triple, the quoted triple in the context of the first graph indicates >> the existence of a different things than the quoted triple in context >> of the second graph. >> >> See https://w3c.github.io/rdf-star/cg-spec/editors_draft.html#mapping >> item 2.2). > -- Antoine Zimmermann ISI - Institut Henri Fayol École des Mines de Saint-Étienne 158 cours Fauriel 42023 Saint-Étienne Cedex 2 France Tél:+33(0)4 77 42 66 03 https://www.emse.fr/~zimmermann/
Received on Friday, 16 December 2022 18:24:37 UTC