eHealth Infrastructure Releases Usage Extension Specification: Defining Data Use in FHIR
Usage - eHealth Infrastructure v3.4.1 - Sundhed.dk
Summary
The eHealth Infrastructure has published the specification for a new extension, "ehealth-usage," based on FHIR R4. This allows for standardizing the purpose and context of data use in clinical settings, thereby enhancing interoperability.
Details
This document details the technical specifications for the "ehealth-usage" Extension, part of the eHealth Infrastructure's implementation built upon FHIR (HL7® FHIR® Standard) R4. The extension is designed to provide context regarding how a piece of data element should be used (Context of Use). Technically, it consists of fields such as `id`, `extension`, and `value[x]`. By attaching this metadata to data elements, systems can explicitly define the intended purpose or usage context for that information. This capability is crucial in healthcare IT because it moves beyond mere structural data exchange; it allows background information—specifically, *who* is using the data and *for what purpose*—to be attached. This standardization helps improve interoperability across different systems by ensuring that when data is exchanged, its intended use context is preserved. The specification was released as version 3.4.1, though a newer version (9.0.1) is noted as superseding it.
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