graphviz/record_uml.dot

// https://stackoverflow.com/questions/38806374/marking-labeling-node-edge-connection-points-with-graphviz/74795871#74795871
digraph structs {
    node [shape=record];
    rankdir=LR
    house [label="<l> House|<cw> Clean water|<dw> Dirty water"];
    street [label="<l> Street|<cw> Clean water|<dw> Dirty water"];
    street:cw -> house:cw;
    house:dw -> street:dw;
}