FHIR uses a modular approach to healthcare data exchange, meaning each piece of information is represented as a "resource."
These resources can be combined to create a comprehensive patient record, which can easily exchange between healthcare systems and applications.
To retrieve the history of a specific resource or version, tools are employed to increase interoperability. The specification is available online, fully hyperlinked, and may be connected from a property's resource to its data type.
FHIR is divided into three sections: general documentation, implementation, and resource list. Available documentation outlines how resources are defined and provide background information such as data type definitions, codes, and XML and JSON format specifications. Users can utilize RESTful architecture programming interface resources as clinical papers or in a service-based design.
FHIR offers a framework for extending and altering resources so that any system may read them, regardless of how they were created. Extension definitions can be fetched using the exact mechanism as other resources. Each resource may include a human-readable text representation in HTML.
FHIR's concepts for enabling interoperability through well-structured data models include the following:
Reuse: To prevent an overcomplicated and duplicate resource collection, FHIR resources are designed to fulfill the broad demands of health care.
Performance: Compared to prior standards, FHIR resources are more straightforward in their architecture, making them more suited for network exchange and more accessible for developers to understand and use.
Usability: FHIR resources are intended to be understood by both technical professionals and non-technical users.
Fidelity: Intermixing values of different data kinds, such as strings and numeric values, is strictly prohibited in FHIR resources. In addition to established sets of business rules, they can be validated by their syntax.
Implementability: FHIR's main objective was to build a standard that various development groups would widely adopt.
FHIR resources are intended to be simple to understand and share utilizing industry standards, popular computer languages, and well-established data exchange methods.
FHIR profiles, on the other hand, define how to use resources in a specific context, such as a healthcare organization or application. They provide a set of constraints and extensions limiting how a resource should be used, making it easier to ensure data is exchanged consistently and accurately between different systems and applications.
FHIR profiles can be used to customize the standard to meet the specific needs of a particular organization or application. They can be shared and reused across different systems and applications, improving interoperability.