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

Code Display Definition
publication-type Publication type Publication type
mesh-heading MeSH heading MeSH heading
supplemental-mesh-protocol Supplemental MeSH for Protocol Supplemental MeSH for Protocol
supplemental-mesh-disease Supplemental MeSH for Disease Supplemental MeSH for Disease
supplemental-mesh-organism Supplemental MeSH for Organism Supplemental MeSH for Organism
keyword Keyword Keyword
citation-subset Citation subset Citation subset
chemical Chemical Chemical
publishing-model Publishing Model Used for PubModel attribute in Medline
knowledge-artifact-type Knowledge Artifact Type Knowledge Artifact Type
coverage Coverage The spatial or temporal topic of the resource, spatial applicability of the resource, or jurisdiction under which the resource is relevant
<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="Cited Artifact Classification 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/cited-artifact-classification-type"/> <content value="complete"/> <concept> <code value="publication-type"/> <display value="Publication type"/> <definition value="Publication type"/> </concept> <concept> <code value="mesh-heading"/> <display value="MeSH heading"/> <definition value="MeSH heading"/> </concept> <concept> <code value="supplemental-mesh-protocol"/> <display value="Supplemental MeSH for Protocol"/> <definition value="Supplemental MeSH for Protocol"/> </concept> <concept> <code value="supplemental-mesh-disease"/> <display value="Supplemental MeSH for Disease"/> <definition value="Supplemental MeSH for Disease"/> </concept> <concept> <code value="supplemental-mesh-organism"/> <display value="Supplemental MeSH for Organism"/> <definition value="Supplemental MeSH for Organism"/> </concept> <concept> <code value="keyword"/> <display value="Keyword"/> <definition value="Keyword"/> </concept> <concept> <code value="citation-subset"/> <display value="Citation subset"/> <definition value="Citation subset"/> </concept> <concept> <code value="chemical"/> <display value="Chemical"/> <definition value="Chemical"/> </concept> <concept> <code value="publishing-model"/> <display value="Publishing Model"/> <definition value="Used for PubModel attribute in Medline"/> </concept> <concept> <code value="knowledge-artifact-type"/> <display value="Knowledge Artifact Type"/> <definition value="Knowledge Artifact Type"/> </concept> <concept> <code value="coverage"/> <display value="Coverage"/> <definition value="The spatial or temporal topic of the resource, spatial applicability of the resource, or jurisdiction under which the resource is relevant"/> </concept> </CodeSystem>