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>