digraph {
  source [label="Source"]
  subject [label="Subject"]
  subject_source_id [label="Subject-source-id"]
  metric [label="Metric"]
  subject_metric [label="Subject-metric"]
  measurement [label="Measurement"]

  subject_source_id -> source
  subject_source_id -> subject
  subject_metric -> subject
  subject_metric -> metric
  measurement -> subject_metric
  measurement -> subject [style="dotted" label="title"]
  measurement -> metric [style="dotted" label="title"]
  measurement -> metric [style="dotted" label="unit"]
  measurement -> subject_metric [style="dotted" label="target"]
  measurement -> metric [style="dotted" label="target"]
}
