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

Re: Graphs, some quick comments

From: Andy Seaborne <andy.seaborne@epimorphics.com>
Date: Thu, 21 Apr 2011 22:01:05 +0100
Message-ID: <4DB09B11.6010909@epimorphics.com>
To: public-rdf-wg@w3.org

Another way to look at it is that the key is exchange over the web.  RDF 
is defined for exchange needs.

What happens within each site with that data isn't the focus of RDF 
providing they meet the specs at the boundaries and the RDF semantics 
define what conclusions can be drawn from the exchanged data. There can 
be many different per-site processing models; what RDF provides is a way 
to communicate over and above bytes and syntax.


On 21/04/11 20:57, Peter Frederick Patel-Schneider wrote:
> I don't think that this is correct.
> In my opinion RDF and RDFS is defined/constrained by its semantics, or
> at least it should be!  In the RDF Semantics you find the bulk of the
> technical details, and in RDF Concepts you find definitions of many of
> the basic concepts of RDF, mostly in Section 6.
> Yes, RDF/XML, the only official exchange syntax for RDF, is not a
> complete syntax for RDF graphs, but that is really a minor point.
> The stuff you mention below is not (yet?) a part of RDF.
> peter
> From: Nathan<nathan@webr3.org>
> Subject: Graphs, some quick comments
> Date: Thu, 21 Apr 2011 10:52:52 -0500
>> (just dropped these in #swig, copying here)
>> RDF is defined/constrained by it's serializations currently, so anything
>> in the model/abstract is in the serializations, so when we discuss
>> things like multiple graphs, graph literals, named graphs, it's done in
>> terms of syntax, when really there is hardly ever a case where you need
>> multiple graphs in the syntax, other than when dumping stores or sets of
>> data, and that ain't RDF.
>> however, behind the interface you need this stuff all the time, but not
>> over the wire, and RDF doesn't handle that.
>> so, perhaps a higher problem is: RDF is defined in terms of on the wire
>> needs, but RDF is used as a data model for working with data behind the
>> interface, and the two have different requirements.
>> if you look at the RDF Graph usecases on the wiki, you'll notice that
>> most of them are about managing or working with data, and people are
>> using the syntax of trig or quads to say what they mean - but only the
>> dumping stores cases actually /require/ having anything in the
>> serialization.
>> Best,
>> Nathan
Received on Thursday, 21 April 2011 21:01:33 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 22:01:58 UTC