| Article Types | Description |
| Article in Press | Items published before assignment to an journal issue |
| Auto/Biography | About a person, author by the person or another |
| Book Chapter/Reference Work | Section from a non-periodical published work, or the entire non-periodical published work |
| Case Report | Article describing the signs, symptoms, diagnosis and resolution of a single or very limited number of patients |
| Clinical Study | Research study of humans where the outcome of a group undergoing a specific treatment is compared to a non-treatment group |
| Commentary/Editorial | Opinion piece, either by editor or guest author |
| Conference Abstract/Paper | Item published in conference proceedings |
| Correction/Erratum/Corrigendum | A notice that amends an already published item. Can include letters to the editor by the authors of the item in question. |
| Dissertation/Thesis | A scholarly work conducted as a requirement for the granting of a degree |
| Expression of Concern | Notice published by the publisher or journal editor in regards to an already published item – generally indicates some type of question as to the accuracy or integrity of the item, but may also be the editor’s/publisher’s response to published comments concerning the item |
| Festschrift | A publication made in honor of someone |
| Government Publication | Non-research published item funded and published by governmental agency or institution |
| Guideline | Published item providing a set or recommendations to follow given a certain set of circumstances |
| Interview/Q&A | A published piece comprised primarily of quotes from a single person |
| Legal Case/Analysis | Review or discussion about interpretations or implications of regulations or laws |
| Letter | Any type of item published in the Correspondence or Letter (to the Editor) section of a journal |
| Meta-Analysis | An analysis of the combined data from several separate studies |
| Other | No other suitable choice is available |
| Research Article | Published item describing a hypothesis, means of exploring the hypothesis, the results of the exploration, and the conclusions drawn from the results |
| Retracted Article | Published item no longer considered a citable source |
| Retraction Notice | Notice published by the publisher, journal editor or original authors that item in question is not to be consider a citable source |
| Review Article | Evaluation of literature concerning a topic, without the presentation of new data |
| Revision | An updated version of an original article that has its own DOI. Generally used for guidelines and preprints, revisions are part of the journal’s usual practice of polishing the original article. It is separate from “Retract and Replace” |
| Supplementary Materials | Data sets and image files published separately and in addition to the original article |
| Technical Report/White Paper | Scientific research paper published by governmental agency or institution |
| Trade Magazine | Periodical with largely non-sourced material published as a commercial venture for a specific audience |