Property:External formatter URI
From Histoty of sciences
Change propagation updates are pending (21 jobs estimated) and it is recommended to wait with modifications to a property until the process has been finalized to prevent intermediary interruptions or contradictory specifications.
"External formatter URI" is a predefined property provided by Semantic MediaWiki to specify an external resource with a placeholder. The URI is expected to contain a placeholder that will be adjusted with an external identifier value to form a valid resource reference. This property is pre-deployed (also known as special property) and comes with additional administrative privileges but can be used just like any other user-defined property.