http://fhir.patientsknowbest.com/searchparameter/document-status
https://www.hl7.org/fhir/STU3/searchparameter.html
name
"document-status"
status
...
"This search parameter allows callers to query over values returned in the http://fhir.patientsknowbest.com/structuredefinition/document-status extension."
...