Thanks a lot for all your answers !

Since I have the case below with anchor (fragment-ID in URL to map to one specific action in my doc.map :

/Doc.html#case1 https://domain2.com/action1;
/Doc.html#case2 https://domain2.com/action2;
/Doc.html https://domain2.com/action3;

How can I do this kind of mapping with Nginx ?

For the moment, my conf is :
map $uri $new_uri {
include /etc/nginx/conf/doc.map;
}

If I type https://domain1.com/Doc.html, the map for action3 works but if I type https://domain1.com/Doc.html#case1 or https://domain1.com/Doc.html#case2, the map doesn't work.

Any idea how to solve that ?

Thanks in advance for your help.

Gilles