In NZ various centres are trialling e-messaging between GPs and the hospital. This means creating a HL7 RSD 2.4 message to send a consultation or clinic note back to GPs. I have successfully created such a message and have been sending letters to GPs .. the letter itself is a PDF which is base64 encoded. The recipient needs to decode the PDF and insert it into the local database. Australia uses HL7 2.3.1 and can't accept PDF attachments so I will have to create a plain text version for Australian users.