| 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| Retracted Article | Published item no longer considered a citable source |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 |
| 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 |