RuneScape:Transclusion

Transclusion is generally the inclusion of the content of a document into another document by reference. In the Wikipedian context, it is the use of the template functionality of MediaWiki to include the same content in multiple documents without having to edit those documents separately.

RuneScape Wiki example
Transclusion is used in the Grand Exchange Market Watch.

See Special:Whatlinkshere/Exchange:Bones for an example.

Updating the price of Bones in Grand Exchange Market Watch/Prayer will update the changes in the article Bones automatically since the Bone Infobox Item includes the template GEPrice|Bones.