[Pellet-users] ANN: Owlgres 0.1 (Alpha Release)

[Michael Smith]

On Thu, 2008-05-08 at 13:58 -0400, James Howison wrote:
> This looks interesting.  Assuming your ontology fits its capabilities,  
> the advantage of this over full Pellet, and for example the Jena  
> reasoners, would be that because it is using the database there is no  
> need to load the whole ontology into memory (because it is using  
> postgres?)

This is an advantage, but one specific to the current implementations.
I.e., Pellet uses only main memory, but it is possible to develop a
reasoner for OWL DL that doesn't have this constraint.

A more significant advantage is that the performance cost of adding data
to the KB is much, much smaller for DL-Lite reasoning than for OWL DL
reasoning.

For interested parties comfortable reading about complexity classes the
profile specification summarizes the known complexity results [1].

-- 
Mike Smith

Clark & Parsia

[1] http://www.w3.org/TR/2008/WD-owl2-profiles-20080411/#Computational_Properties