Is it possible to extend the sitemap.xml file?

[mita4eto]

Hi, guys!

I have the well-known sitemap.xml file generated through this website. I would like to extend this xml file with some more links that have not been noticed by the generator. The question is, is it possible?
If I extend the file and add more links from inside the site, will the final file be a legal and valid sitemap.xml recognized by search engines?

This is the chunk of code i would like to multiply:
<url>
  <loc>[external links are visible to admins only]</loc>
  <priority>0.5</priority>
  <changefreq>daily</changefreq>
</url>


Thanks in advance for your expert responses!

[admin]

Hello,

yes, you can manually add the links to the file, but make sure that you don't break the xml formatting (try to open resulting file in browser and check that it displays no errors).

[mita4eto]

Great! Thank you, admin!