We construct a schema from type information in nodes and relations.
digraph { rankdir=TB node [shape=box style=filled fillcolor=palegreen] "Employee" -> "Employee" [label="Manager"] "Project" -> "Employee" [label="Manager"] "Service" -> "Project" [label="Owner"] "Service" -> "Employee" [label="Team"] "Service" -> "Service" [label="Flow"] "Service" -> "Statistic" [label="Traffic"]}