extend schema
    @link(
        url: "https://specs.apollo.dev/federation/v2.3",
        import: ["@key", "@requires"]
     )

type Query {
  patientRecord(patientId: ID!, recordId: ID!): PatientRecord
  patientRecords: [PatientRecord]
}

type PatientRecord @key(fields: "patient { id } recordId") {
  patient: Patient @external
  recordId: ID!
  diagnosis: String
  treatmentPlan: String
}

extend type Patient @key(fields: "id") {
  id: ID!
  medicalRecords: [PatientRecord] @requires(fields: "id")
}