In the hi3solutions, there are two versions that people think of - Version 2 (V2) and Version 3 (V3). Outlined below are some of the differences between V2 and V3.
Not "Plug and Play" - it provides 80 percent of the interface and a framework to negotiate the remaining 20 percent on an interface-by-interface basisv
Historically built in an ad hoc way because no other standard existed at the time
Generally provides compatibility between 2.X versions
Messaging-based standard built upon pipe and hat encoding
In the U.S., V2 is what most people think of when people say "HL7"
Approaching "Plug and Play" - less of a "framework for negotiation"
Many decades of effort over ten year period reflecting "best and brightest" thinking
NOT backward compatible with V2
Model-based standard built upon Reference Information Model (RIM) provides consistency across entire standard
In the U.S., when Clinical Document Architecture (CDA) is what most people in the U.S. think of when people say "HL7 V3"
we hi3solutions gives HL7v2 services in usa and india