# AGTemporalIntervalDatetimeRelations.java

`package com.franz.agbase.examples;
import com.franz.agbase.*;
public class AGTemporalIntervalDatetimeRelations {
/**
* Demonstrates temporal queries involving Allen relations between an interval and a datetime.
*
* @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("temporal", AGPaths.TRIPLE_STORES);
// Add a datatype mapping so that XMLSchema#dateTime typed literals are
// loaded as date-time UPI's, enabling more efficient storage and range
// querying over dates.
String[] map = new String[3];
map[0] = "http://www.w3.org/2000/01/XMLSchema#dateTime";
map[1] = "date-time";
map[2] = "datatype";
ts.addDataMapping(map);
// Load some temporal data
AGLoadNtriples.loadNTriplesWithTiming(ts, AGPaths.dataSources("temporal.nt"));
// Index the store for faster querying
AGIndexAllTriples.indexAllTriplesWithTiming(ts);
// Register any namespaces
ts.registerNamespace("ex", "http://example.org/");
ts.registerNamespace("t", "http://franz.com/ns/allegrograph/3.0/temporal/");
TriplesIterator cc = ts.getStatements(null, null, null);
AGUtils.showTriples(cc);
// Set up a Prolog query object
PrologSelectQuery q = new PrologSelectQuery();
q.setTripleStore(ts);
q.setDistinct(true);
// Query the store for intervals satisfying interval-before
String pquery = "(interval-before ?i !ex:i68)";
q.setVariables(new String[]{"i"});
q.setQuery(pquery);
ValueSetIterator it = q.run();
System.out.println("Results for " + pquery);
AGUtils.showResults(it);
// Query the store for intervals satisfying interval-before-datetime
pquery = "(interval-before-datetime ?i \"2008-02-06T00:00:00\")";
q.setVariables(new String[]{"i"});
q.setQuery(pquery);
it = q.run();
System.out.println("Results for " + pquery);
AGUtils.showResults(it);
// Query the store for intervals satisfying interval-before-datetime
pquery = "(interval-before-datetime ?i \"2008-02-06\")";
q.setVariables(new String[]{"i"});
q.setQuery(pquery);
it = q.run();
System.out.println("Results for " + pquery);
AGUtils.showResults(it);
// Close the triple store and disconnect from the server.
ts.closeTripleStore();
ags.disable();
}
}
`

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