http://hl7.org/fhir/StructureDefinition/resolve-as-version-specific|5.2.0

If true, indicates that the reference should be resolved to a version-specific reference rather than a version-agnostic reference.

element_id	types
Extension
Extension.extension
Extension.url
Extension.value[x]	boolean
Extension
Extension.id	http://hl7.org/fhirpath/System.String
Extension.extension	Extension
Extension.url	http://hl7.org/fhirpath/System.String
Extension.value[x]	boolean