MESH integration to send Documents to GP's.

Hi,

I've successfully installed and configured the custom MESH API supplied by intersystems. I'm able to send HTML rendered documents directly to GP's using Kettering.xml. 

Ideally, I'd like to be able to send PDF/RTF files rather than HTML. Is this possible and if so can I still use Kettering xml? I know FHIR is the preferred method of transmission but i've tried sending a test FHIR message through MESH to EMIS but it's not displaying so I'm not sure if EMIS is able to display FHIR formatted messages. 

Thanks.

Anthony Breen