The SVNSVN Apache Subversion (often abbreviated SVN, after its command name svn) is a software versioning and revision control system. Software developers use Subversion to maintain current and historical versions of files such as source code, web pages, and documentation. Its goal is to be a mostly compatible successor to the widely used Concurrent Versions System (CVS). WordPress core and the wordpress.org released code are all centrally managed through SVN. https://subversion.apache.org/. notify emails from plugins, dotorg, buddypress and probably bbpressbbPress Free, open source software built on top of WordPress for easily creating forums on sites. https://bbpress.org. don’t link the revision number to the changeset’s URLURL A specific web address of a website or web page on the Internet, such as a website’s URL www.wordpress.org on TracTrac Trac is the place where contributors create issues for bugs or feature requests much like GitHub.https://core.trac.wordpress.org/.. This is the behavior for the WordPress repo. I imagine this might just be a flag or parameter of some sort? They’re really useful.