Alternate mobile pages?

[vsnig]

Is it possible to implement such structure?

...
<url>
  <loc>http://www.example.com/page-1/</loc>
  <xhtml:link
    rel="alternate"
    media="only screen and (max-width: 640px)"
    href="http://m.example.com/page-1" />
</url>
...

https://developers.google.com/search/mobile-sites/mobile-seo/separate-urls

[Matiyeu]

+1

[geun]

+1