On 12/19/2014 23:06, Wim wrote:
Hi Mark,
thanks for your time.
In fact I've tracked down the problem using the examples from the SPIN
distribution: the problem seems to occur because my ontologies are
importing both owrl-all and spl.
You can verify this easily: download the KennedysSPIN ontology and add :
|
<owl:importsrdf:resource="http://spinrdf.org/spl"/>
<owl:importsrdf:resource="http://topbraid.org/spin/owlrl-all"/>
|
If you now run KennedysInferencingAndConstraintsExample.java (modified
so it reads the local KennedysSPIN file), it will fail.
Hi Wim,
I have not been able to reproduce this problem yet. The error looks like
it failed to parse some SPARQL query. The online version of owlrl uses
the text-based SPIN syntax with sp:text, and in order to parse those, it
needs certain prefixes to be visible. However, even if I make the
modifications you suggest, it still seems to work OK. Instead of
modifying the kennedysSPIN file, I have added the owl:imports triples
manually (which should have the same effect):
public class KennedysInferencingAndConstraintsExample {
public static void main(String[] args) {
// Initialize system functions and templates
SPINModuleRegistry.get().init();
// Load main file
Model baseModel = ModelFactory.createDefaultModel();
baseModel.read("http://topbraid.org/examples/kennedysSPIN";);
baseModel.add(ResourceFactory.createResource("http://topbraid.org/examples/kennedysSPIN";),
OWL.imports,
ResourceFactory.createResource("http://topbraid.org/spin/owlrl";));
baseModel.add(ResourceFactory.createResource("http://topbraid.org/examples/kennedysSPIN";),
OWL.imports,
ResourceFactory.createResource(SPL.BASE_URI));
// Create OntModel with imports
...
Despite this change, it still works fine. Could you try to step-by-step
narrow down what is different in your scenario? I can see you use an
ontpolicy file, which is not used by the default example code.
Thanks
Holger
Is this a bug? Would there be a simple workaround? Any idea why this
only fails using the SPIN API and not in TBC?
Thanks a lot for your help,
Wim
Op donderdag 18 december 2014 21:35:50 UTC+1 schreef Mark Graham:
Hi Wim,
Thanks for choosing our TopBraid product. Our development team has
reviewed this issue and here are the recommended steps to address
your question.
Please use the code from
http://www.topquadrant.com/repository/spin/org/topbraid/spin/1.4.0/
<http://www.topquadrant.com/repository/spin/org/topbraid/spin/1.4.0/> to
do the following steps -
- Run inferences(org.topbraid.spin.inference.SPINInferences.java)
on your model.
- Add the triples generated from the inferences to a model.
- Run the
constraints(org.topbraid.spin.constraints.SPINConstraints.java) on
the model containing the SPIN inferences.
Thanks,
Mark
Mark Graham
TopQuadrant Support
On Thu, Dec 18, 2014 at 8:20 AM, Wim <[email protected]
<javascript:>> wrote:
Hello,
I'm trying to do the following:
1) read an ontology (and all its imports), generate all
inferences
2) show all constraint violations.
With TBC SE, I can do this without a problem: I just open the
ontology, generate the inferences, and check the constraint
problems.
However if I do the same with the SPIN API, only the first
step succeeds. SPINConstraints.check throws a
QueryParseException. See full stack trace:
http://pastebin.com/r85LbAVg
This is my code, based on your examples:
http://pastebin.com/pvhA0Q1n
Strangely, if I first use TBC to export everything (all
ontologies + inference graph) into a single file, and apply
the CheckConstraints.java example, it works as expected.
However if I use the RunInferences.java example to generate
the inferences and store everything in one file (as is done in
my code mentioned above, after the exception is thrown), the
CheckConstraints.java example fails again. There's a little
more diagnostics now, apparently it fails for some "spl"
function: http://pastebin.com/WeXfhPa6
If I remove this spl function, it fails on another spl
function, and so on.
I use an ont-policy.rdf file to control which
spl.spin.rdf/spin.rdf/sp.rfd/... files are used by the script.
I've tried to use the RDF files that can be resolved online,
those that came with TBC, and those that are part of the
spinapi jar file. All show the same error.
To run the inferences and constraint checks I will continue to
use TBC, but I'd also like to do this in an automated way via
SPIN API.
Any idea what's going wrong?
Thanks a lot for your help,
Wim
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