A service that lets healthcare applications make use of codes, code systems, and value sets without having to become experts in the fine details of the code system, value set and concept map resources, and the underlying code systems and terminological principles. The service provides the following functionality:

• Defining and managing code systems, value sets, and concept maps
• Code lookup & Validation
• Value Set Expansion (including for UI data entry support)
• Value Set Validation
• Translations between code systems
• Subsumption testing and other logical analyses
• Maintaining a closure table

A service that provides the underlying services needed to test whether resources conform to the rules defined by the FHIR specification and applicable implementation guides, and to help author implementation guides. The service provides the following functionality:

• Defining and managing structure definitions, data elements, Capability statements, search parameters, and operation & compartment definitions
• Resource Validation
• Comparing and subsetting Capability statements

A service that provides basic retrieval and maintenance functionality for clinical knowledge artifacts. The service provides the following functionality:

• Defining and managing plan and activity definitions (e.g. order sets, protocols, decision support rules, documentation templates, etc.), libraries, and measures
• Search and retrieval of knowledge artifacts
• Data requirements analysis of knowledge artifacts

A service that provides measure evaluation functionality. The service provides the following functionality:

• Searching and retrieval of measure definitions
• Evaluation of measures for patients and populations
• Data requirements analysis of measure definitions