W3C home > Mailing lists > Public > www-rdf-logic@w3.org > January 2001

Improved RDF Schema support in Protege-2000

From: Ray Fergerson <fergerson@SMI.Stanford.EDU>
Date: Wed, 31 Jan 2001 13:31:34 -0800
Message-ID: <3A788436.ECBF524C@smi.stanford.edu>
To: rdf interest <www-rdf-interest@w3.org>, rdf logic <www-rdf-logic@w3.org>
We are happy to announce the release of Protege-2000 version 1.5.  This release 
contains a number of major enhancements to the system.  The software can be 
downloaded from our web site at:
Protege-2000 is open-source software and is written in Java.

Protege-2000 is a knowledge-based systems development environment that can be 
used to edit RDF and RDF Schema (and other languages).  We have enhanced our RDF
support in this release in a number of ways.  We have eliminated the need to use
RDF specific metaclasses inside of Protege and automatically convert Protege
concepts to the closest equivalent RDF concept.  This gives a much more natural
way of working with RDF in the Protege environment.  For those modeling
elements in Protege that do not have a corresponding RDF mapping (such as a 
restriction that a property be single-valued), we give users the option of 
either (1) discarding this information on save to produce very clean RDF, 
or (2) keeping the information as additional Protege specific properties.  
We are also using Sergey's latest RDF API implementation which is quite a 
bit faster for large projects.

A simple guide to how to work with RDF in Protege-2000 is available from the
"RDF Support" link in our User's Guide: 
A more detailed look at RDF and Protege-2000 is available at:

The new RDF backend has been designed specifically to be extensible for 
translation to other RDF based languages such as OIL and DAML.  We are 
exploring the possibility of supporting these languages at a later date.  
If you would be particularly interested in such support, please send us a
message (mailto:protege-help@smi.stanford.edu) to let us know.

The Protege Team
Received on Wednesday, 31 January 2001 16:30:37 UTC

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