RDFDB

rdfDB : An RDF Database

What is rdfDB

rdfDB is intended to be a simple, scalable, open-source database for RDF for systems like Semantic Web Services.

The goals of this project are to build a database that is capable of

Supporting a graph oriented API via a textual query language ala SQL.
Load/Reload an RDF file from a url into the database
Scalable to millions of nodes and triples.
Provide support for RDF Schemas.
Provide support for some basic forms of inferencing.
Provide both C and Perl access to the database.
The Perl philosophy applies : Simple things should be simple and complex things should be possible.

The current version is 0.46.

Documentation

The Query Language that rdfDB uses.
Download rdfDB and perl DBI.
Configuring and using rdfDB
Sample session using rdfDB.
Future Plans for rdfDB.
rdfDB Internals.

See also...

Putting RDF to Work article on XML.com by Edd Dumbill
Java interface for rdfDB by Eric van der Vlist (xmlhack article)
Redland - An RDF Application Framework (provides a possible API for plugging in other parsers etc.)
'connecting to rdfdb' thread on the Mozilla-RDF list

Here is a simple www front end browser for the dmoz hierarchy based on rdfDB DBI. Here is the code behind that.

rdfDB has recieved contributions from Dan Brickley, Rael Dornfest, Jeen Broekstra and Eric Van Der Vlist.

If you use rdfDB for something, please drop me a line.

I have started a group a egroups for discussions and notifications regarding rdfDB.