Fwd: RDF2RDB 0.5

FYI ... a useful tool for people that like to work with relational
databases such as MySQL etc.

---------- Forwarded message ----------
From: Michael Brunnbauer <brunni@netestate.de>
Date: 5 August 2012 03:03
Subject: RDF2RDB 0.5
To: semantic-web@w3.org



hi all

to support the proliferation of RDF, I have begun work on a tool to convert
RDF data into relational databases. It is intended for people who want to
use
data available only as RDF but do not have the patience to install a triple
store and learn SPARQL. I know there are tools that present a SQL view
over a triple store but installing such an environment also is quite
challenging.

There has been work on real "converters" in the past, especially the paper
from
Wajee Teswanich and Suphamit Chittayasothorn:


http://hcotuk.etu.edu.tr/semanticweb/A%20Transformation%20from%20RDF%20Documents%20and%20Schemas%20to%20Relational%20Databases.pdf

My tool works much like the one described in this paper (has it ever been
implemented ?), with important differences:

-It supports incremental runs (adding more RDF data to a database later)

-It supports entailment (rdfs:subClassOf, rdfs:subPropertyOf, rdfs:domain,
 rdfs:range, owl:equivalentClass, owl:equivalentProperty,
 owl:FunctionalProperty)

The software is written in Python and uses the RDFLib Python library. It
works
with local and remote files. You can find more information and download it
at

 http://www.netestate.de/De/Loesungen/RDF2RDB

There also example database dumps for

 http://www.w3.org/People/Berners-Lee/card.rdf

and

 http://www.w3.org/People/Berners-Lee/card.rdf
 +
 http://xmlns.com/foaf/spec/index.rdf

there.

Don't rant about the invalid skolem URIs - you can set the skolem URI prefix
to something valid in the configuration :-)

So far this has just been fun and I would like to have some feedback on the
usefulness before I spend more time on it.

Regards,

Michael Brunnbauer

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