Bridging the Legacy Interoperability Gap: A Flexible Approach to Implementing a FHIR Facade for EAV-Based Health...

Area of Science:

• Health Informatics
• Computer Science

Background:

• Healthcare information systems require seamless data exchange for effective interoperability.
• Legacy systems using the Entity-Attribute-Value (EAV) model present challenges for standardization and integration with modern frameworks like HL7 Fast Healthcare Interoperability Resources (FHIR).

Purpose of the Study:

• To present an open-source FHIR façade for EAV-based legacy health information systems.
• To demonstrate a reusable implementation based on HAPI FHIR that facilitates data transformation and integration.

Main Methods:

• Developed an open-source FHIR façade for EAV systems using HAPI FHIR.
• Implemented a methodology separating mapping logic from code for maintainability.
• Focused on managing multiple source forms and ensuring a maintainable transformation solution.

Main Results:

• The FHIR façade effectively transforms legacy EAV data into FHIR resources.
• The approach ensures high accuracy in data transformation.
• System stability and ease of maintenance were maintained.

Conclusions:

• The proposed FHIR façade offers an effective and maintainable solution for integrating EAV legacy systems with modern healthcare standards.
• This facilitates improved data exchange and interoperability in healthcare settings.