User:Timbeale
Sandpit page to demonstrate mediawiki transclusion.
Transclude whole page
The below example uses {{:License}} to include the entire License page.
Note the ':' is important, otherwise it defaults to using the Template namespace. You could alternatively make it explicit that the page you want to transclude is in the Main namespace, i.e. {{Main:License}} does the same thing.
Example
Content is available under the Creative Commons License CC BY 4.0
https://creativecommons.org/licenses/by/4.0/
Transclude part of page
The below example uses the same transclusion (of a different page - {{User:Timbeale/transclusion}}) to include just part of the User:Timbeale/transclusion page.
Example
Here! This paragraph is wrapped in <onlyinclude> markers. It is both visible on the original page it appears on, and any other page that transcludes the original.