Test: Traverse RDF Model

<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:ex="http://example.org/stuff/1.0/"
xmlns:s="http://description.org/schema/">
<rdf:Description about="http://www.w3.org/Home/Lassila">
<s:Creator>
<rdf:Description rdf:nodeID="e85740">
<rdf:type resource="http://description.org/schema/Person"/>
<ex:Name>Ora Lassila</ex:Name>
<ex:Email>lassila@w3.org</ex:Email>
</rdf:Description>
</s:Creator>
</rdf:Description>
</rdf:RDF>

//include RDF API
define("RDFAPI_INCLUDE_DIR", "C:/OpenSA/Apache/htdocs/rdf_api/api/");
include(RDFAPI_INCLUDE_DIR . "RDFAPI.php");

// Filename of an RDF document
$base="example1.rdf";

// Create a new MemModel
$model = ModelFactory::getDefaultModel();

// Load and parse document
$model->load($base);

// Get Iterator from model
$it = $model->getStatementIterator();

// Traverse model and output statements
while ($it->hasNext()) {
   $statement = $it->next();
   echo "Statement number: " . $it->getCurrentPosition() . "<BR>";
   echo "Subject: " . $statement->getLabelSubject() . "<BR>";
   echo "Predicate: " . $statement->getLabelPredicate() . "<BR>";
   echo "Object: " . $statement->getLabelObject() . "<P>";
}

// Move to the last statement and print it
$it->moveLast();
$statement = $it->current();

// Traverse model backward and print statements
echo $statement->toString() . "<BR>";
while($it->hasPrevious()) {
   $statement = $it->previous();
   echo $statement->toString() . "<BR>";
}

// Jump to statement 2 and print it
$it->moveTo(2);
$statement = $it->current();
echo $statement->toString() . "<BR>";