The National Library of Medicine (NLM) Value Set Authority Center (VSAC), with support from the Centers for Medicare and Medicaid Services (CMS), has announced the launch of intensional value set definition functionality in the VSAC Authoring Tool.
Through the VSAC Authoring user interface, value set authors can algorithmically define value sets with logical rule-based Boolean clauses and hierarchy operators, leveraging the structure and hierarchies of terminologies. Logically-defined value sets, combined with the value set author's guidance, can incorporate future changes as terminologies evolve to add or remove concepts, increasing efficiency and accuracy of value set creation and maintenance.
The first deployment of VSAC Intensional Functionality provides support for hierarchy functions for several terminologies. Later in 2019 they will add intensional functionality for more terminologies, including RxNorm and LOINC®.
To learn more about VSAC Support Center: Create an Intensional Value Set, visit https://www.nlm.nih.gov/vsac/support/authorguidelines/createvs.html.
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