This server supports the DSTU 0.8 version of FHIR and implements all FHIR rest operations. This server is regularly reloaded with the official example resources.
If you want to use this server for trying out FHIR, see the examples. We have a online FHIR client named Torch here.
If you want to develop your own FHIR client, you can read more about it here: FHIR client development
FHIR is the newest HL7 implementation. FHIR aims to be simplify the implementation of HL7v3 without sacrificing information integrity. The current version of fhir is Version 0.12. This is the draft standard for trial use (DSTU).