The official version of the OHIE workflows can be found in the OpenHIE Architecture Specification.
Description: This transaction allows a PoS, or any OHIE component, to access terminological information in the terminology service to query for Value Sets. A typical example would be to request the set of Value Sets defined by WHO.
Both external systems and systems inside the HIE may perform this transaction directly with the TS. The sequence diagram below shows the steps that occur for a system using this transaction.
Sponsor: Jack Bowie
Status: This operation has been extensively tested in FHIR Connectathons.
title Query Value Set participant PoS participant TS PoS->TS:  Query Value Set request TS->PoS:  Query Value Set response
Below enter each interaction that makes up the described workflow above.
|1||Query ValueSet request||TS|
The Value Set search request is triggered by a PoS or other HIE component.
Input: A set of FHIR search parameters.
|FHIR ValueSet Resource|
|2.||Query Value Set response||PoS||The response is sent back to the requesting system. Output: a Bundle of ValueSet Resources that satisfy the search parameters.||FHIR ValueSet Resource|