On Mar 9, 2013, at 1:07 AM, Scott Henninger wrote:
> Cosmas; Others may have more specific help in terms of the SPIN API, but one
> thought is whether you are importing the SPIN library when trying to execute
> the inference? Chances are, there is a missing file - and one way to to find
> it is to look at your model in Composer. Make sure all of the files used in
> Composer to run the rule successfully are present in your Java code.
Yes, and one way to debug this would be to separate the query part from the
inferencing part. Instead of doing the inferences in your JSP, try starting
with a file that has all inferences asserted. Then see if the query works.
Coming from the other end, try debugging which triples are different when you
save the programmatically inferred model into a file and open that with TBC.
We do not yet have enough information about your set up to give more detailed
insights.
Holger
>
> Also I couldn't help but look at your Java (not JSP) code and present the
> much simpler and more maintainable SWP syntax as something to consider. This
> takes 2 objects because I decided to place the SPARQL in a template as
> opposed to embedding it in the tags.
>
> subclass of spin:SelectTemplate named :PriceType:
>
> SELECT ?a ?b
> WHERE {
> ?s :resto_name ?a .
> ?s :price_type ?b .
> }
>
> subclass of ui:Element named :displayTable:
>
> <ui:call ui:template=":PriceType">
> Found {= spr:rowCount(?rs) } triples
> <br/>This is the data <br/>
> <table border='1'>
> <ui:forEach ui:resultSet="{= ?rs }">
> <tr><td>{= ?a }</td>
> <td>{= ?b }</td></tr>
> </ui:forEach>
> </table>
> </ui:call>
>
> Note how, as is done in JSP etc., the HTML/XML (any text really) is defined
> directly with processing directives ( {= } ) embedded in the text. And since
> this snippet is named, it becomes a custom tag, <:displayTable/>, that can be
> used anywhere in other XML snippets or called as a Web service. I.e. the
> above creates a custom tag and custom tags are defined using
> SPARQL/XHTML/JavaScript all the way down.
>
> For more on SWP take a look at these links:
> - http://uispin.org/
> - http://www.topquadrant.com/swp/
> - Composer Help at opBraid Composer > Developing Semantic Web Applications
> > SPARQL Web Pages Overview
>
> Again, just something to consider...
>
> -- Scott
>
> On 3/8/2013 2:48 AM, cosmas haryawan wrote:
>> Dear all,
>> I have an owl file with name resto.owl, and created a simple rule using
>> construct like this :
>> CONSTRUCT {
>> ?s :price_type ?p .
>> }
>> WHERE {
>> ?s :highest_price ?h .
>> BIND (IF((?h > 3000), "EXPENSIVE", "CHEAP") AS ?p) .
>> }
>>
>> Using TBC, I have run a simple sparql in SPARQL editor:
>> SELECT ?a ?b
>> WHERE {
>> ?s :resto_name ?a .
>> ?s :price_type ?b .
>> }
>>
>> All worked perfect!
>>
>> The problem is,
>> when I executed the same sparql using SPIN API, I got the right newTriples
>> size but with no result in Sparql query.
>> Any help or hint will be appreciated.
>> Thanks.
>> This is my JSP script :
>>
>> SPINModuleRegistry.get().init();
>> Model baseModel =
>> ModelFactory.createDefaultModel(ReificationStyle.Minimal);
>> baseModel.read("http://localhost/resto.owl";);
>> String vResult = "";
>> String query = "";
>>
>> // Create OntModel with imports
>> OntModel ontModel =
>> ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM, baseModel);
>> // Create and add Model for inferred triples
>> Model newTriples =
>> ModelFactory.createDefaultModel(ReificationStyle.Minimal);
>> ontModel.addSubModel(newTriples);
>> // Register locally defined functions
>> SPINModuleRegistry.get().registerAll(ontModel, null);
>> // Run all inferences
>> SPINInferences.run(ontModel, newTriples, null, null, false, null);
>>
>> vResult = " Found : " + String.valueOf(newTriples.size()) + "
>> triples <br/> "
>> + "This is the data <br/><table border='1'>";
>>
>> query = ""
>> + " select ?a ?b "
>> + " where { "
>> + " ?s :resto_name ?a . "
>> + " ?s :price_type ?b . "
>> + " } ";
>>
>> Query arqQuery = ARQFactory.get().createQuery(baseModel, query);
>> QueryExecution qexec =
>> ARQFactory.get().createQueryExecution(arqQuery, baseModel);
>> try {
>> ResultSet rs = qexec.execSelect();
>> for (; rs.hasNext();) {
>> QuerySolution qs = rs.nextSolution();
>> vResult += "<tr><td> "+
>> qs.getLiteral("a").getValue().toString() + "</td>";
>> vResult += "<td> "+ qs.getLiteral("b").getValue().toString()
>> + "</td>";
>> vResult += "</tr>";
>> }
>> vResult += "</table>";
>> } finally {
>> qexec.close();
>> }
>>
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>
>
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