This code system http://hl7.org/fhir/artifact-contribution-instance-type defines the following codes:

CodeDisplayDefinition
reviewed ReviewedReviewed
approved ApprovedApproved
edited EditedEdited
<status value="active"/><experimental value="false"/><date value="2021-03-11T10:55:11.085+11:00"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><description value="Artifact Contribution Instance Type"/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/artifact-contribution-instance-type"/><content value="complete"/><concept><code value="reviewed"/><display value="Reviewed"/><definition value="Reviewed"/></concept><concept><code value="approved"/><display value="Approved"/><definition value="Approved"/></concept><concept><code value="edited"/><display value="Edited"/><definition value="Edited"/></concept></CodeSystem>