This code system http://terminology.hl7.org/CodeSystem/publishing-model-type defines the following codes:

Code Display Definition
Print Print Journal in print only (see https://www.nlm.nih.gov/bsd/licensee/elements_descriptions.html#article).
Print-Electronic Print-Electronic Journal in print and electronic formats (see https://www.nlm.nih.gov/bsd/licensee/elements_descriptions.html#article).
Electronic Electronic Journal in electronic format only (see https://www.nlm.nih.gov/bsd/licensee/elements_descriptions.html#article).
Eletronic-eCollection Eletronic-eCollection Electronic-only journal that publishes individual articles then later collects with issue date (see https://www.nlm.nih.gov/bsd/licensee/elements_descriptions.html#article).
<status value="draft"/> <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="To identify the medium/media in which the cited article is published, eg print, electronic or print-electronic."/> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/publishing-model-type"/> <content value="complete"/> <concept> <code value="Print"/> <display value="Print"/> <definition value="Journal in print only (see https://www.nlm.nih.gov/bsd/licensee/elements_descriptions.html#article)."/> </concept> <concept> <code value="Print-Electronic"/> <display value="Print-Electronic"/> <definition value="Journal in print and electronic formats (see https://www.nlm.nih.gov/bsd/licensee/elements_descriptions.html#article)."/> </concept> <concept> <code value="Electronic"/> <display value="Electronic"/> <definition value="Journal in electronic format only (see https://www.nlm.nih.gov/bsd/licensee/elements_descriptions.html#article)."/> </concept> <concept> <code value="Eletronic-eCollection"/> <display value="Eletronic-eCollection"/> <definition value="Electronic-only journal that publishes individual articles then later collects with issue date (see https://www.nlm.nih.gov/bsd/licensee/elements_descriptions.html#article)."/> </concept> </CodeSystem>