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

CodeDisplayDefinition
classification ClassificationThe report is primarily a listing of classifiers about the report subject.
search-results Search ResultsThe report is a composition of results generated in response to a search query.
resources-compiled Resource CompilationThe report is a composition containing one or more FHIR resources in the content.
text-structured Structured TextThe 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>