The sitemap will automatically collect all cacheable sites and provides a XML- and plaintext-output – that's why it is “indexed”.
The XML-Sitemap (eg. for Google) is available with: index.php?type=841132 The TXT-Sitemap is available with: index.php?type=841131
If you have more than one tree in your TYPO3 you will have to add the root-PID to your Sitemap, e.g.:
- Tree #1 with PID 123: index.php?id=123&type=841132
- Tree #2 with PID 234: index.php?id=234&type=841132