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Re: Named Graph Serialisation

From: Chris Bizer <chris@bizer.de>
Date: Thu, 26 Jul 2007 07:49:01 +0200
Message-ID: <002001c7cf48$c72c6980$c4e84d57@named4gc1asnuj>
To: "P.L.Coetzee" <P.L.Coetzee@open.ac.uk>, <semantic-web@w3.org>

Hi Peter,

there is also TriG. See http://sites.wiwiss.fu-berlin.de/suhl/bizer/TriG/

TriG is a plain text format for serializing Named Graphs and RDF Datasets. 
The TriG syntax offers a compact and readable alternative to the XML-based 
TriX syntax.
TriG is roughly Turtle, extended with

  a.. '{' and '}' to group triples into multiple graphs and
  b.. to precede named graphs by their names
  c.. optional :- graph naming operator
TriG is implemented by NG4J which works together with Jena and by Sesame. So 
you can use the syntax together with both frameworks.



Chris Bizer
Freie Universitšt Berlin
+49 30 838 54057
----- Original Message ----- 
From: "P.L.Coetzee" <P.L.Coetzee@open.ac.uk>
To: <semantic-web@w3.org>
Sent: Wednesday, July 25, 2007 5:49 PM
Subject: Named Graph Serialisation

Dear all,

I have a fairly large set of data persisted in a quad-store, consisting of a 
set of named graphs within a single dataset. Other than TRiX, I've yet to 
come across any 'accepted' means of seralising the graphs into a single RDF 
dump (ideally which could be read in without massive memory overhead, such 
as can be easily done with N-Triples).

The obvious solution to me would be a sort of 'N-Quadruples', whereby one 
serialises the Graph URI as the first element per line, followed by the 
usual S-P-O triple pattern of N-Triples. This seems like the simplest 
solution (in terms of ease of implementation, readability, as well as for 
any future processing on the set). What are the list's thoughts on such an 
approach; is there any prior art that I'm missing, other standards that can 
achieve the same goals that etc?

Thanks in advance for your thoughts!

Received on Thursday, 26 July 2007 05:53:05 UTC

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