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4.3.2.127 CodeSystem http://hl7.org/fhir/requirement-category

Responsible Owner: FHIR Infrastructure icon Work Group Normative Use Context: Country: World
Official URL: http://hl7.org/fhir/requirement-category Version: 6.0.0-ballot4
active as of 2026-07-10 Computable Name: RequirementCategory
Flags: CaseSensitive, Complete OID: TBD

This Code system is used in the following FHIR core-defined or referenced value sets:

4.3.2.127.1 Definition

Requirement Category

4.3.2.127.2 Content

Generated Narrative: CodeSystem requirement-category

Last updated: 2026-07-10T15:41:34.935Z

This case-sensitive code system http://hl7.org/fhir/requirement-category defines the following codes in a Is-A hierarchy:

LvlCodeDisplayDefinitionCopy
1 behavioral Categories related to how the system behaves btn btn
2   business Business Requirements relating to the business operations of the entities responsible for a system btn btn
2   functional Functional Requirements related to what the system does (inputs turned into outputs) btn btn
3     exchange Exchange Requirements relating to when, how, or what data is exchanged with other systems btn btn
3     processing Processing Requirements related to how data must be analyzed, transformed, considered, or otherwise used within a system btn btn
3     storage Storage Requirements related to if or how data is persisted in a system btn btn
2   non-functional Non-functional Requirements related to how the system accomplishes functional requirements btn btn
3     availability Availability Requirements related to how and when a system needs to be reachable and useable btn btn
3     ui User Interface Requirements related to how information is collected from and exposed to humans (or animals) btn btn
4       ui-accessibility UI Accessibility Requirements around user interface that ensure a satisfactory experience for users from different backgrounds or with varying physical, cognitive, and/or sensory abilities btn btn
4       ui-consistency UI Consistency Requirements around ensuring that different implementations have sufficiently aligned appearance and mechanisms of interaction btn btn
4       ui-usability UI Usability Requirements related to the intuitiveness, simplicity, and ease-of-use of a user-interface btn btn
3     security Security/Privacy Requirements that ensure that data is appropriately protected from threats and respects rules around what parties are permitted to access or manipulate btn btn
3     safety Safety Requirements that ensure that system operation does not negatively impact the wellbeing of people or assets btn btn
3     performance Performance/Scalability Requirements that deal with timeliness of processing and/or responsiveness under differing levels of load/volume btn btn
1 source Categories related to where the requirement came from btn btn
2   user User Requirements originating from the community of individuals expected to use the system/solution btn btn
2   legal Legal Requirements originating from regulation or law btn btn
2   design Design decision Requirements documenting decisions made in the design of the solution btn btn

 

See the full registry of code systems defined as part of FHIR.

Explanation of the columns that may appear on this page:

Level A few code lists that FHIR defines are hierarchical - each code is assigned a level. See Code System for further information.
Source The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code The code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
Display The display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
Definition An explanation of the meaning of the concept
Comments Additional notes about how to use the code