EXPECTED RESULT:
book1 = Knowledge Discovery in Databases.
ACTUAL RESULT:
Knowledge Discovery in Databases.';
$mgr = new XmlManager();
$con = $mgr->createContainer("test.dbxml");
$con->putDocument($book_name, $book_content);
$doc = $con->getDocument($book_name);
$s = $doc->getContentAsString();
print $doc->getName(). " = $s\n";
unset($doc);
unset($con);
$mgr->removeContainer("test.dbxml");