@startuml
entity "Project" as project {
  *id: number
  *name: varchar(255)
}
entity "Policy" as policy {
  *id: number
  *classification: number
  *project_id: number
  *software_license_id: number
}
entity "SoftwareLicense" as license {
  *id: number
  *spdx_id: varchar(255)
  *name: varchar(255)
}
project ||..|{ policy
license ||..|{ policy
@enduml