@startuml
class Subject {
+isPartOf
+studiedState
+biologicalSex
+internalIdentifier
+phenotype
+species
+strain

}
Subject -d-> "isPartOf" SubjectGroup
Subject -d-> "studiedState" SubjectState
Subject -d-> "biologicalSex" BiologicalSex
Subject -d-> "phenotype" Phenotype
Subject -d-> "species" Species
Subject -d-> "strain" Strain

@enduml