[Mediawiki-l] Reg Transcluded page

[rajkumar subbarayan]

Hi All,

what is Wikipedia: ? in the below link

http://en.wikipedia.org/wiki/Wikipedia:Selected_anniversaries/September_11

i got this link from wikipedia home page.this page is transcluded page in
home page.
Usually templates are used for transcluding.But what is Wikipedia here

Thanks and Regards,
Raj S
<http://en.wikipedia.org/wiki/Wikipedia:Transclusion>