| Code | Display | Definition |
| audio | Audio file | The article cited is an audio file. |
| D001877 | Book | Non-periodical written or printed works consisting of sheets of pages fastened or bound together within covers. |
| cds-artifact | Clinical Decision Support Artifact | The artifact is used for decision support for healthcare decisions. |
| D016420 | Comment | Comment |
| common-share | Common Share | Citation Resource containing value added data that is openly shared |
| D019991 | Database | A structured file of information or a set of logically related data stored and retrieved using computer-based means. |
| D064886 | Dataset | Works consisting of organized collections of data, which have been stored permanently in a formalized manner suitable for communication, interpretation, or processing. |
| dataset-unpublished | Dataset Unpublished | An organized collection of data that is not stored permanently for communication. |
| Electronic | Electronic | the journal is published in electronic format only |
| Electronic-eCollection | Electronic-eCollection | used for electronic-only journals that publish individual articles first and then later collect them into an "issue" date that is typically called an eCollection. |
| Electronic-Print | Electronic-Print | the journal is published first in electronic format followed by print (this value is currently used for just one journal, Nucleic Acids Research) |
| executable-app | Executable app | Executable app |
| fhir-resource | FHIR Resource | The article cited is a FHIR resource. |
| image | Image file | The article cited is an image file. |
| interactive-form | Interactive Form | A user interface that supports data entry and data display. |
| D016428 | Journal Article | Journal Article |
| D016422 | Letter | Letter |
| machine-code | Machine code | The article cited is machine code. |
| medline-base | Medline Base | Citation Resource containing only data from Medline |
| prediction-model | Prediction Model | A formula or expression used to calculate an outcome representing a predicted result. |
| D000076942 | Preprint | Scientific manuscript made available prior to PEER REVIEW. |
| Print | Print | the journal is published in print format only |
| Print-Electronic | Print Electronic | the journal is published in both print and electronic format |
| project-specific | Project Specific | Citation Resource containing value added data specific to a project |
| protocol | Protocol | The article cited is the protocol of an activity and not the results or findings. |
| pseudocode | PseudoCode | A non-executable, human-readable representation of software code. |
| D016425 | Published Erratum | Published Erratum |
| standard-specification | Standard Specification | An explicit set of requirements for an item, material, component, system or service, often used to define a technical standard which is an established norm or requirement for a repeatable technical task. |
| terminology | Terminology | A structured set of codes and display values, which may be subtyped as a code system, value set, taxonomy, or ontology. |
| D059040 | Video-Audio Media | Used with articles which include video files or clips, or for articles which are entirely video. |
| webpage | Webpage | Webpage |