Recent discussions have pushed us to have basic support for sending VCF files. Currently possible via Sequence.repository.url (eg, pointing to a separate Binary resource), but a bit awkward semantically (sequence calling may not have taken place yet, must specify Sequence.coordinateSystem). Other options through Observation and DiagnosticReport are similiarly awkward with the methods provided.

I recommend we change the semantics to better show this is a current capability and/or add a separate element to directly support this.

Zulip chat topic: https://chat.fhir.org/#narrow/stream/43-genomics/topic/attaching.20genomic.20files