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

Code Display Definition
classification Classification The report is primarily a listing of classifiers about the report subject.
search-results Search Results The report is a composition of results generated in response to a search query.
resources-compiled Resource Compilation The report is a composition containing one or more FHIR resources in the content.
text-structured Structured Text The report is a structured representation of text.
<status value="active"/> <experimental value="false"/> <date value="2020-12-28T16:55:11+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 kind of report, such as grouping of classifiers, search results, or human-compiled expression."/> <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/evidence-report-type"/> <content value="complete"/> <concept> <code value="classification"/> <display value="Classification"/> <definition value="The report is primarily a listing of classifiers about the report subject."/> </concept> <concept> <code value="search-results"/> <display value="Search Results"/> <definition value="The report is a composition of results generated in response to a search query."/> </concept> <concept> <code value="resources-compiled"/> <display value="Resource Compilation"/> <definition value="The report is a composition containing one or more FHIR resources in the content."/> </concept> <concept> <code value="text-structured"/> <display value="Structured Text"/> <definition value="The report is a structured representation of text."/> </concept> </CodeSystem>