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

Re: contexts, graph names and so on

From: Richard Cyganiak <richard@cyganiak.de>
Date: Fri, 11 Nov 2011 17:04:09 +0000
Cc: RDF-WG <public-rdf-wg@w3.org>
Message-Id: <843263DC-5782-4380-B4E5-DC39ABA3EB08@cyganiak.de>
To: Andy Seaborne <andy.seaborne@epimorphics.com>
On 11 Nov 2011, at 14:00, Andy Seaborne wrote:
>> It actually works out exactly the same. It's really like this (pardon the ASCII art):
>> 
>>   :g ----xxx---->  {ggg}
>>    |                |
>> denotes          denotes
>>    |                |
>>    v                v
>>  thing ---yyy--->  graph
> 
> Good art - I can cope with morphism diagrams.  (Brings back memories of my Riemann Surfaces course.)
> 
> 
> The difference is that yyy isn't a property.

xxx is an IRI. yyy is the property (relationship type) denoted by the IRI. You could add another arrow down the middle:

  :g -----xxx--->  {ggg}
   |       |        |
denotes denotes  denotes
   |       |        |
   v       v        v
 thing ---yyy--->  graph

When xxx is owl:sameAs then we have a special case where “thing” and “graph” at the bottom are actually the same single thing, and both :g and {ggg} denote it.

Richard
Received on Friday, 11 November 2011 17:04:48 GMT

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