14 Terminology
HDR FHIR supports a terminology feature to use and manage code.
The general pattern for representing coded values in resources uses the following four elements:
- system - A URI that identifies the system
- version - A string value representing a version of the original code system
- code - A string value that identifies a concept as defined by the code system
- display - A description of the concept as defined by the code system
Example:
{
"system" : "http://loinc.org",
"version" : "2.62",
"code" : "55423-8",
"display" : "Number of steps in unspecified time Pedometer"
}
- Uploading CodeSystems
In most cases, it is useful to upload your own CodeSystems for use in HDR FHIR Repository. This might mean uploading external Terminologies such as LOINC/SNOMED or loading custom terminologies such as local CodeSystems defined for organizational specific use. - Applying Deltas to CodeSystems
A pair of FHIR operations can be used to add or remove codes from the CodeSystems. These operations directly add or remove the codes from the specified CodeSystem. - ValueSet
The FHIR Specification defines two resource types that are used as a part of defining and using codes.