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#### AU Core 2.0.0-preview for Testing

This November 2025 preview snapshot incorporates the normative changes from AU Core 2.0.0-ballot. This snapshot supports testing of AU Core 2.0.0 prior to publication.

Key updates and changes in this version are shown in the AU Core [Change Log](changes.html).

Testing plays a crucial role in the development of AU Core. It helps to build an AU Core that is aligned with its intended purpose and is practical, and responsive to the diverse needs of various stakeholders.  

Testing AU Core helps identify issues, challenges, or gaps in the specification, enabling its improvement. During testing, implementers test their FHIR resources, software products, and/or proof of concepts with AU Core and provide essential feedback.

To learn more about testing AU Core or express your interest in participating, see [AU Core FHIR IG Testing](https://confluence.hl7.org/display/HAFWG/AU+Core+FHIR+IG+Testing).

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