HtmlDocument::checkMetadata

public function checkMetadata()
{
	$result = (    $this->metadata['TITLE'] != ''
				&& $this->metadata['DESCRIPTION'] != ''
				&& $this->metadata['IMAGE'] != '');

	if ($this->isEmbeddingAllowed())
	{
		$result = $result && $this->metadata['EMBED'] != '';
	}

	return $result;
}