The quality of the evidence described. The code system used specifies the quality scale used to grade this evidence source while the code specifies the actual quality score (represented as a coded value) associated with the evidence.

The strength of the recommendation assigned to this reference. The code system used specifies the rating scale used to rate this recommendation while the code specifies the actual recommendation rating (represented as a coded value) associated with this recommendation.

A bibliographic citation for the related resource. This text SHOULD be formatted according to an accepted citation format.

A reference to a Library containing the formal logic used by the artifact.

The name of a condition expression that determines the applicability of the item. For example, when appearing on a question in a questionnaire, if the expression evaluates to true, the question is applicable, otherwise, the question is not applicable.

The name of an expression in a referenced library that determines an initial value.

The name of an expression in a referenced library that determines a calculated value.

A FHIRPath expression that provides the value for the element or resource on which it appears.

A CQL expression that provides the value for the element or resource on which it appears.

A CodeableConcept that assigns meaning to the response object on which it appears.

The measure criteria that resulted in the resource being included in a particular evaluatedResources bundle.