Inferencing in free version

[David]

Should inferencing be working in the free version of Composer? When I
run the inferencer I see the '0 triples added' message and no added
triples appear under the Inferences tab. I had this working
successfully in the Maestro edition, but I wanted to show the process
to some colleagues using the free edition.

[Scott Henninger]

David; I expect you mean OWL inferences. If so please see
http://www.topquadrant.com/products/TBS_FAQ.html#TBC11. Otherwise see
Help > TopBraid Composer > SPIN to find out how to perform general
SPARQL-based inferencing.

-- Scott

[Holger Knublauch]

Hi David,

the Free Edition only includes a single inference engine, for SPARQL Rules [1]. The default inference engine of Maestro is SwiftOWLIM, which is a rule-based OWL engine. If you want to get similar results as the OWLIM engine, you need to select a SPARQL Rule base containing the OWL RL rules. I recently blogged about this [2]. In your workspace, you will find a file owlrl-all.rdf, which you need to import into your model (drag and drop it into the Imports view). Then run inferences as usual. Note that in 3.4 this will be much easier and has been significantly improved and cleaned up. Note that depending on the OWLIM settings, the SPARQL Rules engine (TopSPIN) may return different results. If you have specific needs not covered by OWL RL, please let us know.

Regards,
Holger

[1] http://spinrdf.org
[2] http://composing-the-semantic-web.blogspot.com/2010/09/rdfs-plus-as-subset-of-owl-rl-in-sparql.html

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[David]

Thank you both for your replies. I did as Holger suggested and was
able to run inferences as expected. OWL RL is working great for me so
far -- thanks again!

On Sep 9, 10:38 pm, Holger Knublauch <hol...@topquadrant.com> wrote:
> Hi David,
>
> the Free Edition only includes a single inference engine, for SPARQL Rules [1]. The default inference engine of Maestro is SwiftOWLIM, which is a rule-based OWL engine. If you want to get similar results as the OWLIM engine, you need to select a SPARQL Rule base containing the OWL RL rules. I recently blogged about this [2]. In your workspace, you will find a file owlrl-all.rdf, which you need to import into your model (drag and drop it into the Imports view). Then run inferences as usual. Note that in 3.4 this will be much easier and has been significantly improved and cleaned up. Note that depending on the OWLIM settings, the SPARQL Rules engine (TopSPIN) may return different results. If you have specific needs not covered by OWL RL, please let us know.
>
> Regards,
> Holger
>
> [1]http://spinrdf.org

> [2]http://composing-the-semantic-web.blogspot.com/2010/09/rdfs-plus-as-s...