This code system http://hl7.org/fhir/report-relation-type defines the following codes:

CodeDisplayDefinition
replaces ReplacesThis document replaces or supersedes the target document.
amends AmendsThis document notes corrections or changes to replace or supersede parts of the target document.
appends AppendsThis document adds additional information to the target document.
transforms TransformsThis document was generated by transforming the target document (eg format or language conversion).
replacedWith Replaced WithThis document was.
amendedWith Amended WithThis document was.
appendedWith Appended WithThis document was.
transformedWith Transformed WithThis document was.
<status value="active"/><experimental value="false"/><date value="2021-01-05T10:01:24+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="The type of relationship between reports."/><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/report-relation-type"/><content value="complete"/><concept><code value="replaces"/><display value="Replaces"/><definition value="This document replaces or supersedes the target document."/></concept><concept><code value="amends"/><display value="Amends"/><definition value="This document notes corrections or changes to replace or supersede parts of the target document."/></concept><concept><code value="appends"/><display value="Appends"/><definition value="This document adds additional information to the target document."/></concept><concept><code value="transforms"/><display value="Transforms"/><definition value="This document was generated by transforming the target document (eg format or language conversion)."/></concept><concept><code value="replacedWith"/><display value="Replaced With"/><definition value="This document was."/></concept><concept><code value="amendedWith"/><display value="Amended With"/><definition value="This document was."/></concept><concept><code value="appendedWith"/><display value="Appended With"/><definition value="This document was."/></concept><concept><code value="transformedWith"/><display value="Transformed With"/><definition value="This document was."/></concept></CodeSystem>