That is odd... I see a blue diamond in the "IO" lane, and when I select it, it shows the "Output Data" to the right... I don't see the "IO" lane in your snip at all... so it must be something else? 

If the Gateways are configured on mirrored instances of HealthShare, then typically a virtual IP is used to determine and redirect to the active instance, to provide for high availability or fail over.  If not, then perhaps this approach could be considered?  

I sure do wish it was documented some where... I looked, but couldn't find it.

Any reference to the documentation would greatly be appreciated! 

Thanks for the feedback, and my particular interest does involve working with VA/VHA migration; however, in my research I found

the following, which may provide an answer to any who may be interested...

Vaccination

A vaccination is a special kind of medication.

  • SDA Object ClassHS.SDA3.Vaccination
  • TableHSAA.Vaccination
  • Relevant CubeVaccinations

Note:

InterSystems maintains a document (in Microsoft Excel format) that contains detailed information on the source or potential sources of data for each element in the DeepSee cubes.

To obtain a copy of this document, contact the InterSystems Worldwide Response Center (WRC) and request the Health Insight cube data details spreadsheet.

Thanks for the information!

I found the following in the HealthShare "Help" online documentation: 

"In Information Exchange, the patient’s medical record is transmitted in a format called SDA (Summary Document Architecture), which is an InterSystems format based on CDA (Clinical Document Architecture)."

However, it doesn't tell me much about SDA ( now SDA3 ) nor a very detailed definition or history of the format and purpose.

I was hoping to find more details.