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The official version of the OHIE workflows can be found in the OpenHIE Architecture Specification.

Overview

Description: This transaction allows a PoS, or any OHIE component, to access terminological information in the terminology service and retrieve the set of all Concepts in the Value Set. Rather than testing each code contained in an incoming patient data message for Value Set membership, this operation enables a component to "cache" the Value Set members and test individual membership locally, avoiding extensive network overhead. Due to the likely updating of Value Set definitions, on the other hand, components should periodically refresh their local copy of the expansion.

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