This page is part of the FHIR Specification (v0.0.82: DSTU 1). The current version which supercedes this version is 5.0.0.  For a full list of available versions, see the Directory of published versions 
. Page versions: R5 R4B R4 R3 R2
A Profile is a special resource that provides additional rules about how a type of resource is utilized in a particular context of use, or for a particular use case.
Some particular use cases are common or important enough to be described as a part of the specification itself:
| Name | Usage | 
| General Extensions | A set of general extensions defined for the convenience of implementers that use FHIR resources | 
| US Profile | Contains constraints and extensions to the FHIR specification specific to the US realm | 
| ISO 21090 | Extra ISO 21090 features not included in data types because of core design policy | 
| Questionnaire | Core extensions for Questionnaire | 
| Tools Extensions | Extensions defined by the build tools. These extensions are candidates for being elevated into the core in a subsequent version | 
Other profiles may be found in the general profile repository (reference to be provided).