A priority refinement finer than R4's request-priority vocabulary allows, currently one concept: trivial, meaning below routine. Task.priority binds required to a value set whose floor is routine and is a bare code with no second coding slot, so a refinement cannot be carried in the element itself. When this extension is present Task.priority SHALL be routine, so a consumer that ignores the extension sorts the task as routine -- an understatement rather than a mis-sort.
Elements / Details
Every element this profile touches, with its full definition. Element names in the tables link here.
A priority refinement finer than R4's request-priority vocabulary allows, currently one concept: trivial, meaning below routine. Task.priority binds required to a value set whose floor is routine and is a bare code with no second coding slot, so a refinement cannot be carried in the element itself. When this extension is present Task.priority SHALL be routine, so a consumer that ignores the extension sorts the task as routine -- an understatement rather than a mis-sort.
May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Comments
There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Source of the definition for the extension code - a logical name or a URL.
Comments
The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.