##Box with content
##box content inside
##Specify the content of a box between curly-braces. End with a semicolon.
C: Client;
S: Server;
B: Backend;
->C: Hit;
box C==C: Generate\nrequest;
C=>S: Request;
box S..B: Server gets info
{
    S>>B: Query;
    S<<B: Response;
};
C<=S: Reply;

