Which of these is a component of a FHIR resource?

A FHIR (Fast Healthcare Interoperability Resources) resource is designed to be a standardized data format that facilitates the exchange of healthcare information. Among the components of a FHIR resource, a URL serves as a crucial identifier for accessing and managing the resource within health systems. It provides a unique way to identify the resource across different platforms and interactions, making it easy for systems to refer to specific pieces of data.

Additionally, data types are essential within FHIR resources as they define the kind of information that can be stored. These data types specify the structure and constraints of the data being handled, leading to better interoperability and understanding between different healthcare applications.

While Z segments relate to specific implementations of FHIR resources (often specific to various deployments and not standard), they are not universally recognized components of a standard FHIR resource. Therefore, focusing on the URL and data types as integral components highlights why they are the correct answer in identifying the essential attributes of FHIR resources in healthcare interoperability.