12 labelfontname="Helvetica",
30 operating_system [ label="Operating System", shape=ellipse ];
31 io_service [ label="io_service" ];
32 io_object [ label="I/O Object\ne.g. socket" ];
33 your_program [ label="Your Program" ];
36 // Owning relationships.
38 edge [ arrowtail="diamond" ];
39 your_program:w -> io_object:nw;
40 your_program:se -> io_service:ne;
43 // Non-owning relationships;
45 io_object:sw -> io_service:w;
50 edge [ style="dashed", color="#808080" ];
54 your_program:sw -> io_object:n [ label="1" ];
55 io_object:s -> io_service:nw [ label="2" ];
56 io_service:sw -> operating_system:nw [ label="3" ];
61 edge [ arrowhead="none", arrowtail="open" ];
62 io_service:se -> operating_system:ne [ label="4" ];
63 io_object:se -> io_service:n [ label="5" ];
64 your_program:s -> io_object:ne [ label="6" ];