Having had to explain it many many times to new users I think the dialogue for 
adding a new network package source to yast often confuses users who are 
unsure which part of a URL for a package source should go in which field. eg 
people often try putting http:// in the server name box along with the server 
name, or they put the directory also in the server name and are unsure about 
the second.  
 
It would be better imho to have one field where user can paste the whole url 
to the package source which would behave in the same way as 
"installation_sources -a" and work out protocol server name and directory 
without the user needing to know what they mean.