Arden Syntax for Medical Logic Systems v3.0

Description

Arden Syntax v3.0 will be an updated successor to Arden Syntax v2.10 in the universal realm. The primary change in v3.0 over v2.10 will be incorporation of a standard data model for external data mappings in order to address the “curly braces” problem. The target data model will be based on the FHIR specification.

The FHIR standards for data access are currently in a mixed normative/STU status. Therefore, the Arden Syntax v3.0 specification will be released as a STU. We anticipate that when a fully normative FHIR standard for data access and storage emerges, we will be able to move the specification to a normative standard.

Misc Notes
2026 June: TSC approved an STU Publication Request for HL7 Arden Syntax for Medial Logic Systems v 3.0 for 2 years 2025 February: TSC approved STU Publication Request for HL7 Arden Syntax for Medical Logic Systems v3.0 for 2 years HL7 Arden Syntax for Medical Logic Systems v3.0 STU through 2025-12-11 2021 Sept: Updated PSS May 2019: RJenders provided updated target dates. 2018 Oct: RJenders provided an updated PSS May 2016: RJenders provided updated target dates. Name of previous standard: Arden Syntax for Medical Logic Systems v2.10 Date it was published: May 2014 Rationale for revision: Key obstacles to widespread adoption of the Arden Syntax are the diversity of data models in current use in EHRs and the consequent need to remap data elements when sharing computable knowledge (Medical Logic Modules). Use of a standard data model will enhance knowledge sharing by allowing organizations to map once between their local data model and the FHIR data standard. This will ease the process of implementing knowledge encoded using a standard data model. The relationship between the new standard and the current: The revised standard will extend the current standard.