public function render()
{
// Create XML writer
$objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
$objWriter->startDocument('1.0', 'UTF-8');
// office:document-meta
$objWriter->startElement('office:document-meta');
$objWriter->writeAttribute('xmlns:office', 'urn:oasis:names:tc:opendocument:xmlns:office:1.0');
$objWriter->writeAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
$objWriter->writeAttribute('xmlns:dc', 'http://purl.org/dc/elements/1.1/');
$objWriter->writeAttribute('xmlns:meta', 'urn:oasis:names:tc:opendocument:xmlns:meta:1.0');
$objWriter->writeAttribute('xmlns:presentation', 'urn:oasis:names:tc:opendocument:xmlns:presentation:1.0');
$objWriter->writeAttribute('xmlns:ooo', 'http://openoffice.org/2004/office');
$objWriter->writeAttribute('xmlns:smil', 'urn:oasis:names:tc:opendocument:xmlns:smil-compatible:1.0');
$objWriter->writeAttribute('xmlns:anim', 'urn:oasis:names:tc:opendocument:xmlns:animation:1.0');
$objWriter->writeAttribute('xmlns:grddl', 'http://www.w3.org/2003/g/data-view#');
$objWriter->writeAttribute('xmlns:officeooo', 'http://openoffice.org/2009/office');
$objWriter->writeAttribute('xmlns:drawooo', 'http://openoffice.org/2010/draw');
$objWriter->writeAttribute('office:version', '1.2');
// office:meta
$objWriter->startElement('office:meta');
// dc:creator
$objWriter->writeElement('dc:creator', $this->getPresentation()->getDocumentProperties()->getLastModifiedBy());
// dc:date
$objWriter->writeElement('dc:date', gmdate('Y-m-d\\TH:i:s.000', $this->getPresentation()->getDocumentProperties()->getModified()));
// dc:description
$objWriter->writeElement('dc:description', $this->getPresentation()->getDocumentProperties()->getDescription());
// dc:subject
$objWriter->writeElement('dc:subject', $this->getPresentation()->getDocumentProperties()->getSubject());
// dc:title
$objWriter->writeElement('dc:title', $this->getPresentation()->getDocumentProperties()->getTitle());
// meta:creation-date
$objWriter->writeElement('meta:creation-date', gmdate('Y-m-d\\TH:i:s.000', $this->getPresentation()->getDocumentProperties()->getCreated()));
// meta:initial-creator
$objWriter->writeElement('meta:initial-creator', $this->getPresentation()->getDocumentProperties()->getCreator());
// meta:keyword
$objWriter->writeElement('meta:keyword', $this->getPresentation()->getDocumentProperties()->getKeywords());
// @todo : Where these properties are written ?
// $this->getPresentation()->getDocumentProperties()->getCategory()
// $this->getPresentation()->getDocumentProperties()->getCompany()
$objWriter->endElement();
$objWriter->endElement();
$this->getZip()->addFromString('meta.xml', $objWriter->getData());
return $this->getZip();
}