<DocumentReference xmlns="http://hl7.org/fhir"><id value="example-genomicfile-hla00001"/><identifier><system value="http://www.somesystemabc.net/identifiers/files"/><value value="11111"/></identifier><status value="current"/><docStatus value="preliminary"/><description value="A sample Document Reference instance representing HLA00001."/><securityLabel><coding><system value="http://terminology.hl7.org/CodeSystem/v3-Confidentiality"/><code value="R"/><display value="Restricted"/></coding></securityLabel><content><attachment><contentType value="text/html"/><url value="https://www.ebi.ac.uk/Tools/dbfetch/dbfetch?db=imgthla;id=HLA00001;format=fasta;style=raw"/><title value="HLA00001"/></attachment></content></DocumentReference>