Whether this module definition's membership can change through the passage of time alone. True means the criteria are anchored to a moving reference point ("no visit in the last six months"), so membership goes stale without any write and a periodic re-evaluation is required. False means membership can only change when data changes, so a change feed is sufficient. Derived from the criteria logic, not declared beside it.
Elements / Details
Every element this profile touches, with its full definition. Element names in the tables link here.
Whether this module definition's membership can change through the passage of time alone. True means the criteria are anchored to a moving reference point ("no visit in the last six months"), so membership goes stale without any write and a periodic re-evaluation is required. False means membership can only change when data changes, so a change feed is sufficient. Derived from the criteria logic, not declared beside it.
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.
true = membership rots with the clock; false = membership changes only on a write
Definition
Always populated explicitly. An absent extension means this data-requirements analysis did not produce the Library, NOT that the value is false -- those two have opposite consequences for whether a periodic sweep is required.