Jeff,
I believe your model needs to import (have a sub-graph for) spin.rdf - this
defines spin:_this. If you want to avoid this, there is a TBC preference on the
SPIN page to switch off reusing shared variables, and have blank nodes each
time.
Regards,
Holger
On May 25, 2010, at 4:49 AM, Schmitz, Jeffrey A wrote:
> Hello,
> I’m using the SPIN API (latest version) to try to execute a spin:rule on a
> model (_model). The actual rule predicate being processed is a subproperty
> of spin:rule and is defined as follows in my Ontology:
>
> CONSTRUCT {
> ?this Advise:failureRate 10.0 .
> }
> WHERE {
> ?this Advise:failureRate ?rate .
> }
>
> (This is just a dummy query to see if I can get the spin rules stuff
> working).
>
>
> In my code I call:
>
> SPINInferences.run(_model, spinInfModel,
> _spinRulesClass2QueryMap, initialTemplateBindings,
> exp,
> _spinRuleStats, true, inferenceType.inferenceProp(),
> null, null);
>
> I write the _model to file just before the call, and it looks good (the above
> query works correctly on it when run in TBC). However, when the code runs I
> don’t get any results.
>
> One interesting thing is I print out the query inside
> SPINInferences.runQueryOnClass using
>
> System.out.println(arq.toString());
>
> And it lists:
>
> CONSTRUCT
> { spin:_this Advise:failureRate 10.0 .}
> WHERE
> { ?this rdf:type ?TYPE_CLASS .
> spin:_this Advise:failureRate ?rate
> }
>
> So the class2Query stuff seems to be finding my spin:rule predicate ok, but
> the query looks a little strange with the spin:_this.
>
> I also print out the query solution map (i.e. bindings):
>
> TYPE_CLASS = http://www.boeing.com/IVHM/Advise.owl#Failure
>
> The above query seems a little funny since (as far as I can tell) it is
> passed directly into the ARQ function of qexec.execConstruct(), which I’m
> guessing isn’t going to match up spin:_this with anything in my model. Any
> ideas what’s going on here?
>
> Thanks,
> Jeff
>
>
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