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

type Query {
  patient(id: ID!): Patient
  patients: [Patient]
}

type Patient @key(fields: "id") {
  id: ID!
  name: String
  dateOfBirth: String
}

type PatientRecord @key(fields: "patient { id } recordId") {
  patient: Patient
  recordId: ID!
  admissionDate: String
  extendPatientRecord: PatientRecord @requires(fields: "patient { id } recordId")
}