How to add a tag in a subversion repository

So you just submitted your app to the Apple's review team. Before starting work on the next release of your app, you should create a tag in your subversion repository to keep a marker of the sources for the submitted release. Simple to do:

svn copy file:///Users/username/Subversion/UPM/trunk/uPasswords file:///Users/username/Subversion/UPM/tags/3.1.0.357 -m "tagging UPM Version 3.1.0.357"

That is all. Now, in Xcode's Organizer, click the Repository tab then expand the tags node. You'll get all the tags you defined.