[protege-releases] Protege 4.1 Alpha

We are pleased to announce that the first alpha build of Protege 4.1 is 
available on our website:

http://protege.stanford.edu/download/registered.html#p4.1

Protege 4.1 alpha is the first Protege release that is fully conformant 
with OWL 2.0. The OWL 2.0 language specification [1] only recently 
became a recommendation on October 27, 2009.

Starting with Protege 4.1, it is our intention to utilize Protege's 
automatic update mechanism [2] to distribute new features and bug fixes. 
We hope this will allow us to be more responsive to issues reported on 
the Protege 4 mailing list [3], and result in faster progress toward a 
stable release of Protege 4.1.

Protege 4.1 alpha is based on version 3.0.0 of the OWL API [5], which is 
the first version of the OWL API that conforms to the OWL 2.0 language 
specification. Version 3.0.0 has some incompatibilities with previous 
versions of the OWL API.  As a consequence, plug-ins developed for 
Protege 4.1 will not be backwards compatible with Protege 4.0.*.  We 
recommend that new development be done against the 4.1 version of 
Protege as this is the focus of future work.

We also made some changes to the distribution formats:

1).  The OS X community now has the option to download Protege in the 
application bundle format [4].

2).  The platform-independent installer program was redesigned to be 
compatible with use on a multi-user operating system. This means that an 
administrator can install a single read-only copy of Protege on a system 
that will be used by many users sharing system access.

A web-based version of these release notes is available on our wiki [6].

Best Regards,
The Protege Team

[1] http://www.w3.org/TR/owl2-syntax/
[2] http://protegewiki.stanford.edu/index.php/EnablePluginAutoUpdate
[3] http://mailman.stanford.edu/mailman/listinfo/p4-feedback
[4] http://en.wikipedia.org/wiki/Application_Bundle
[5] http://owlapi.sourceforge.net/
[6] 
http://protegewiki.stanford.edu/index.php/Protege_4.1_Alpha_Release_Notes

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