This code system http://hl7.org/fhir/contributor-summary-source defines the following codes:

Code Display Definition
publisher-data Publisher provided Data copied by machine from publisher data.
article-copy Copied from article Data copied by human from article text.
citation-manager Reported by citation manager Data copied by machine from citation manager data.
custom custom format Custom format (may be described in text note).
<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="Used to code the producer or rule for creating the display string."/> <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/contributor-summary-source"/> <content value="complete"/> <concept> <code value="publisher-data"/> <display value="Publisher provided"/> <definition value="Data copied by machine from publisher data."/> </concept> <concept> <code value="article-copy"/> <display value="Copied from article"/> <definition value="Data copied by human from article text."/> </concept> <concept> <code value="citation-manager"/> <display value="Reported by citation manager"/> <definition value="Data copied by machine from citation manager data."/> </concept> <concept> <code value="custom"/> <display value="custom format"/> <definition value="Custom format (may be described in text note)."/> </concept> </CodeSystem>