Wikipedia content copyrights and installation

When trying to copy some material about hyacc to wikipedia, and also put a link to the original source, I was warned by a copyright notice. The effort was aborted.

Later I found this information on copyrights problem when publishing on wikipedia: http://en.wikipedia.org/wiki/Wikipedia:Copyrights

Wikipedia is an open source project: http://sourceforge.net/projects/wikipedia/
From http://en.wikipedia.org/wiki/Mediawiki: "MediaWiki is a web-based wiki software application used by all projects of the Wikimedia Foundation".

The Wikipedia source download page is: http://www.mediawiki.org/wiki/Download
The current stable version is 1.11.1. It can be installed on platforms from FreeBSD, GNU/Linux, MacOS X, Netware, Solaris to Windows.

If install it on linux, I would want to install on Open Suse: http://en.opensuse.org and see http://en.opensuse.org/Download_Help