As 3HS has been investigating updating its HIT system, one of the vendors has

As 3HS has been investigating updating its HIT system, one of the vendors has touted his product’s commitment to the HL7 FHIR standard.  The procurement task force has asked is 3HS should move to that standard.  Explain what you will advise:  who is HL7 and what is the standard known as version 2, version 3, CDA and FHIR.