DocumentReference Simple

DocumentReference doc = new DocumentReference();

doc.setSubject(new Reference("https://demographics.spineservices.nhs.uk/STU3/Patient/9658218881"));
doc.setStatus(Enumerations.DocumentReferenceStatus.CURRENT);
doc.getType().addCoding()
        .setSystem("http://snomed.info/sct")
        .setCode("734163000")
        .setDisplay("Care Plan");
doc.addAuthor()       .setReference("https://directory.spineservices.nhs.uk/STU3/Organization/RR8").setDisplay("LEEDS TEACHING HOSPITALS NHS TRUST");
doc.setIndexed(new Date());
doc.getContext().getPracticeSetting().addCoding()
        .setSystem("http://snomed.info/sct")
        .setCode("408467006")
        .setDisplay("Adult mental illness");
System.out.println(FhirContext.forDstu3().newJsonParser().setPrettyPrint(true).encodeResourceToString(doc));