protected function renderDataTable()
    {
        $html = "<table " . ($this->tableId ? "id=\"{$this->tableId}\" " : "") . "border=\"1\">\n<thead>\n\t<tr>\n";

        foreach ($this->allColumns as $name => $toDisplay) {
            if ($toDisplay !== false) {
                if ($name === 0) {
                    $name = 'value';
                }
                if ($this->translateColumnNames) {
                    $name = $this->translateColumnName($name);
                }
                $html .= "\t\t<th>$name</th>\n";
            }
        }

        $html .= "\t</tr>\n</thead>\n<tbody>\n";

        foreach ($this->tableStructure as $row) {
            $html .= "\t<tr>\n";
            foreach ($this->allColumns as $name => $toDisplay) {
                if ($toDisplay !== false) {
                    $value = "-";
                    if (isset($row[$name])) {
                        if (is_array($row[$name])) {
                            $value = "<pre>" . self::formatValueXml(var_export($row[$name], true)) . "</pre>";
                        } else {
                            $value = self::formatValueXml($row[$name]);
                        }
                    }

                    $html .= "\t\t<td>$value</td>\n";
                }
            }
            $html .= "\t</tr>\n";
        }

        $html .= "</tbody>\n</table>\n";

        return $html;
    }