Indication of the degree of conformance expectations associated with a binding.
This Code system is referenced in the content logical definition of the following value sets:
This CodeSystem is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)
This case-sensitive code system http://hl7.org/fhir/binding-strength defines the following codes:
Code
Display
Definition
required
Required
To be conformant, the concept in this element SHALL be from the specified value set.
extensible
Extensible
To be conformant, the concept in this element SHALL be from the specified value set if any of the codes within the value set can apply to the concept being communicated. If the value set does not cover the concept (based on human review), alternate codings (or, data type allowing, text) may be included instead.
preferred
Preferred
Instances are encouraged to draw from the specified codes for interoperability purposes but are not required to do so to be considered conformant.
example
Example
Instances are not expected or even encouraged to draw from the specified value set. The value set merely provides examples of the types of concepts intended to be included.