# AGPrologIncludeInferred.java

`package com.franz.agbase.examples;
import com.franz.agbase.*;
public class AGPrologIncludeInferred {
/**
* Demonstrates some basics of using the includeInferred setting in PrologSelect queries.
*
* @param unused
* @throws AllegroGraphException
*/
public static void main(String[] args) throws AllegroGraphException {
// Connect to server, which must already be running.
AllegroGraphConnection ags = new AllegroGraphConnection();
try {
ags.enable();
} catch (Exception e) {
throw new AllegroGraphException("Server connection problem", e);
}
// Create a fresh triple-store for this example.
AllegroGraph ts = ags.renew("prologincludeinferred", AGPaths.TRIPLE_STORES);
// Register your namespaces
ts.registerNamespace("ex","http://example.org/");
// Add some triples to the store
ts.addStatement("!ex:a","!ex:owned-by","!ex:b");
ts.addStatement("!ex:c","!ex:owns","!ex:d");
ts.addStatement("!ex:jans","!ex:owns","!ex:birra");
ts.addStatement("!ex:owned-by","!owl:inverseOf","!ex:owns");
// Index the store
ts.indexAllTriples();
// Set up a PrologSelect query object that does not include RDFS++ inferences.
PrologSelectQuery q = new PrologSelectQuery();
q.setTripleStore(ts);
q.setIncludeInferred(false);
// Here the q functor will not include rdfs++-inferred
// results because the includeInferred setting is false.
String[] vars = new String[]{"x","y"};
String pquery = "(q ?x !ex:owns ?y)";
q.setVariables(vars);
q.setQuery(pquery);
ValueSetIterator it = q.run();
System.out.println("Results (no reasoning) for " + pquery);
AGUtils.showResults(it);
// Now include inferences.
q.setIncludeInferred(true);
it = q.run();
System.out.println("Results (with reasoning) for " + pquery);
AGUtils.showResults(it);
// Close the triple store and disconnect from the server.
ts.closeTripleStore();
ags.disable();
}
}
`

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