HL7 Workbench
Beta
v2.2
Message Structures
ACK_O02
HL7 v2.x
Parser
Sign in
ACK_O02
ACK_O02
3 segments
2.1
Dec
1992
2.2
Nov
1994
2.3
Apr
1997
...
Message Structure
Message Structure
3 segments
Tree
Grammar
R
Required
O
Optional
Choice
MSH
R
1
MSA
R
1
ERR
O
1