Improving CDS Documentation Accuracy with the Ballerina Health Tool

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This article discusses the development process for standardized APIs (such as FHIR and CDS Hooks) used for exchanging clinical data. The Ballerina Health Tool, developed by WSO2, is a CLI-based utility that automates tasks like generating FHIR-compliant packages and creating CDS service templates. This significantly reduces errors and complexity associated with manual implementation against strict specifications. The author discovered a critical documentation inconsistency while using the tool: the example response for CDS Hooks incorrectly showed a FHIR Practitioner resource. Since CDS services must return structured cards, this misleading example caused confusion for new developers. To fix this, the documentation was updated to include the proper CDS Hooks response structure (including summary, indicator, suggestions, etc.). This contribution not only corrected the technical inaccuracy but also demonstrated how accurate documentation is vital in the highly regulated field of healthcare IT, enhancing the tool's reliability and contributing back to the open-source ecosystem.