I'm building a sitemap for a page available in different languages, however the URL construction was done with subdomains and not folders. I'd like to know if it's possible to indicate a different sitemap for the subdomain pages inside the main page, as follows:
</url>
<loc>http://www.example.com/</loc>
</url>
<url>
<loc>http://fr.example.com/index-sitemap.xml</loc>
</url>
<url>
<loc>http://es.example.com/index-sitemap.xml</loc>
</url>
<url>
<loc>http://it.example.com/index-sitemap.xml</loc>
</url>
<url>
<loc>http://blog.example.com/index-sitemap.xml</loc>
</url>