GlassFish ESB v2.2 was released in late December/early January 2010. This release brings a number of design-time improvements in handling HL7 v2 messages. Some of these have been on my and other people’s wish lists for years.
HL7 v2 structure nodes use full names, rather then acronyms like MSH.1.
In BPEL, mapping can be performed at message, segment, component, subcomponent and field level.
These improvements are noteworthy enough to warrant a note, GFESBv22_HL7_Handling_Improvements.pdf, at http://blogs.czapski.id.au/wp-content/uploads/2010/03/GFESBv22_HL7_Handling_Improvements.pdf.