XMPP sub‑status

None "-- the user does not have a subscribe to the contact's presence information, and the contact does not have a subscribe to the user's presence Information
 

 
"To" -- the user has a subscribe to the contact's presence information, but the contact does not have a subscribe to the user's presence Information
 

 
"From" -- the contact has a subscribe to the user's presence information, but the user does not have a subscribe to the contact's presence Information
 

"Both" -- both the user and the contact have subscriptions to each other's presence Information
 

 None indicates that there is no relationship between the user and the contact (although it exists in the Buddy List of the server ); 
 To indicates that the user can see the contact's presence, but the contact cannot see the user's presence; 
The opposite of from and to means that the user cannot see the contact's presence, but the contact can see it; 
 Both indicates that the other party's presence can be seen between correlation.