Example of a composition covering details from more than one patient

{
  "resourceType" : "Composition",
  "id" : "example-mixed",
  "status" : "final",
  "type" : {
    "coding" : [{
      "system" : "http://loinc.org",
      "code" : "78418-1",
      "display" : "Neonatal perinatal medicine Discharge summary"
    }]
  },
  "category" : [{
    "coding" : [{
      "system" : "http://loinc.org",
      "code" : "LP183761-8",
      "display" : "Report"
    }]
  }],
  "subject" : [{
    "reference" : "Patient/newborn",
    "display" : "Tahlia Smith"
  }],
  "date" : "2018-10-30T16:56:04+11:00",
  "author" : [{
    "reference" : "Practitioner/xcda-author",
    "display" : "Harold Hippocrates, MD"
  }],
  "title" : "Discharge Summary (Neonatal Service)",
  "attester" : [{
    "mode" : {
      "coding" : [{
        "system" : "http://hl7.org/fhir/composition-attestation-mode",
        "code" : "legal",
        "display" : "Legal"
      }]
    },
    "time" : "2012-01-04T09:10:14Z",
    "party" : {
      "reference" : "Practitioner/xcda-author",
      "display" : "Harold Hippocrates, MD"
    }
  }],
  "custodian" : {
    "reference" : "Organization/2.16.840.1.113883.19.5",
    "display" : "Good Health Clinic"
  },
  "section" : [{
    "title" : "Child's Details",
    "code" : {
      "coding" : [{
        "system" : "http://acme.org/codes/SectionType",
        "code" : "newborn",
        "display" : "New Born Details"
      }]
    },
    "text" : {
      "status" : "generated",
      "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n        (snip)\n\t\t\t</div>"
    }
  },
  {
    "title" : "Mpther's Details",
    "code" : {
      "coding" : [{
        "system" : "http://acme.org/codes/SectionType",
        "code" : "mother",
        "display" : "Mother's Details"
      }]
    },
    "text" : {
      "status" : "generated",
      "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n\t\t\t\t(snip)\n\t\t\t</div>"
    }
  }]
}