W3C home > Mailing lists > Public > public-rdf-wg@w3.org > March 2011

+blank node identifiers was- Re: [Graphs] Fwd: Comments on "SPARQL 1.1 Uniform HTTP Protocol for Managing RDF Graphs"

From: Nathan <nathan@webr3.org>
Date: Fri, 18 Mar 2011 21:25:27 +0000
Message-ID: <4D83CDC7.4000605@webr3.org>
CC: Sandro Hawke <sandro@w3.org>, Andy Seaborne <andy.seaborne@epimorphics.com>, Pat Hayes <phayes@ihmc.us>, RDF Working Group <public-rdf-wg@w3.org>
Nathan wrote:
> Sandro Hawke wrote:
>> On Fri, 2011-03-18 at 19:22 +0000, Andy Seaborne wrote:
>>> Is g-snap->g-text is just a function of the content type?
>>
>> Well, probably, for our purposes, I think so. 
>> There's a trivial case where it's not: the  arbitrary non-semantic
>> variability in serialization, eg whitespace.  So, some notion of
>> equivalence class of g-texts may be important.
>>
>> There's a related problem I don't know if we can or should address,
>> which is how to deal with websites which use cookies or other
>> information (IP address, browser sniffing, etc) to customize content.
> 
> I was going to raise that, it's where the "resource state" http/rest 
> story and the rdf "snapshot" story both breaks down.
> 
> Perhaps we should just scrap that story early on and have Named-G-Box = 
> ( <u>, GB ) where GB = { gt1, gt2, gt3, ... }
> 
> Where gt* are g-texts, and GB is a g-box. A g-box being a set of g-texts 
> over time. And of course a named-g-box is just a GB associated with a URI.
> 
> If we need g-snap, which I'm sure we do, then perhaps each g-text 
> encodes/serializes a g-snap, and several g-texts may all 
> encode/serialize equivalent g-snaps, but that requires g-snap equality 
> to be determined.
> 
> O, actually I quite like that, then all g-snap's are anonymous abstract 
> sets of rdf triples, and it's the set of g-texts (g-box) that is 
> associated with a name.

Ahh, then blank node identifiers would be a property of the g-text, and 
the g-texts can be associated with a named-g-box, which would surely set 
blank node identifier scoping to the named-g-box level?
Received on Friday, 18 March 2011 21:26:41 UTC

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