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Re: Native RDF DBs

From: Alberto Reggiori <alberto@asemantics.com>
Date: Sat, 17 Apr 2004 12:22:11 +0200
Message-Id: <16AB84D6-9059-11D8-8AA6-0003939CA324@asemantics.com>
Cc: www-rdf-interest@w3.org
To: danny666@virgilio.it

On Apr 16, 2004, at 8:03 PM, Danny Ayers wrote:

>
> I'm sure I've seen three or four different triplestores that were more 
> native than dumping triples in a RDBMS - anyone got any relevant 
> links, please?

RDFStore [1] is a BSD-licensed lightweight native RDF storage written 
in C/Perl which uses a ad-hoc hashed storage with various compressed 
multi-dimensional sparse matrix inverted indexes. It supports simple 
SPO, RDQL [2] and fetch_object [3] query methods - free-text Unicode 
indexing and stemming on literals is fully supported. As well as 
indexing of rdf:datatype and xml:lang literal properties. Graph naming 
(contexts/provenance) is fully supported at the API and query level - 
and graphs can be serialized to RDF/XML and N-Triples containing full 
naming information [4]. It also includes pure perl RDF/XML and 
N-Triples parsers which passes all positive RDFCore tests [5].

For a more detailed description of the DB back-end see

http://www.asemantics.com/presos/SWAD-E/SWADe-rdfstore.html

as presented [6] at the SWAD-e storage and retrieval workshop [7] in 
Amsterdam last November

Various demos and demonstrators has been build [8][9][10][11][12] with 
the toolkit.

Lastest code is aval on CVS at SourceForge

cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/rdfstore login
cvs -z3 -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/rdfstore co 
rdfstore

or latest snapshot bundle at 
http://rdfstore.sourceforge.net/downloads/snap.tgz - we successfully 
compiled the package on BSD, OSX, Linux, Solaris and Gygwin.

hope this helps

Albe

[1] http://www.rdfstore.com/
[2] http://www.w3.org/Submission/2004/SUBM-RDQL-20040109/
[3] http://www.joseki.org/RDF_data_objects.html
[4] 
http://lists.w3.org/Archives/Public/www-rdf-interest/2004Feb/0209.html
[5] http://www.rdfstore.org/testcases/
[6] http://www.asemantics.net/presos/SWAD-E/swad-e-rdfstore/
[7] http://www.w3.org/2001/sw/Europe/reports/dev_workshop_report_4/
[8] http://demo.asemantics.com/rdfstore
[9] http://demo.asemantics.com/biz/nb2/
[10] http://earth.esa.int/isc/
[11] http://demo2.asemantics.com/biz/rdfa/
[12] http://www.asemantics.com/n/solutions/wadi.html
Received on Saturday, 17 April 2004 06:22:15 GMT

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