Details
-
Change Request
-
Resolution: Unresolved
-
Medium
-
FHIR Core (FHIR)
-
R5
-
Conformance
-
StructureDefinition
Description
Based on best practices - need to create a code system for the data usage codes
| Indicator | Description | Implementation Requirement | Operational Requirement |
| R | Required | The application must support an element with an “R” usage designation. | The application must value an element with an “R” usage designation. |
| RE | Required, but may be empty | The application must support an element with an “RE” usage designation. | The application must value an element with an “RE” designation if data is known for that element. |
| C | Undeclared Conditional | There are no implementation requirements. The “C” usage designation is a placeholder indicating that the usage for this element has not yet been specified. | Not Applicable. |
| C(a/b) | Declared Conditional | The application must support the implementation requirements as indicated by the true (“a”) outcome and by the false (“b”) outcome usage indicators in the declared conditional definition. | The operational usage designation for the element is determined based on the outcome of an associated predicate at runtime. If the predicate associated with the element is true, follow the usage rule requirements for “a”, which must be one of “R”, “RE”, “O”, or X”: If the predicate associated with the element is false, follow the usage rule requirements for “b”, which must be one of “R”, “RE”, “O”, or X”. |
| X | Not supported | There are no implementation requirements. | The application must not value an element with an “X” usage designation. |
| O | Optional | There are no implementation requirements. The “O” usage designation is a placeholder indicating that the usage for this element has not yet been specified. | Not Applicable. |
| B | Backwards Compatible | There are no implementation requirements. The “B” usage indicates that the element is retained for backwards compatibility of the element. Another usage indicator may be assigned in a derived profile. | Not Applicable |
