| Code | Display | Definition |
| primary |
Primary title |
Main title for common use. The primary title used for representation if multiple titles exist. |
| official |
Official title |
The official or authoritative title. |
| scientific |
Scientific title |
Title using scientific terminology. |
| plain-language |
Plain language title |
Title using language common to lay public discourse. |
| subtitle |
Subtitle |
Subtitle or secondary title. |
| short-title |
Short title |
Brief title (e.g. 'running title' or title used in page headers) |
| acronym |
Acronym |
Abbreviation used as title |
| earlier-title |
Different text in an earlier version |
Alternative form of title in an earlier version such as epub ahead of print. |
| language |
Different language |
Additional form of title in a different language. |
| autotranslated |
Different language derived from autotranslation |
Machine translated form of title in a different language, language element codes the language into which it was translated by machine. |
| human-use |
Human use |
Human-friendly title |
| machine-use |
Machine use |
Machine-friendly title |
| duplicate-uid |
Different text for the same object with a different identifier |
An alternative form of the title in two or more entries, e.g. in multiple medline entries |