How are tags made in Subversion?

Question

I know how to use tags in subversion. I create a tag every time I get to a release milestone.

What I don\'t quite understand is how they work.

Is a tag just a c

Answer 1

Right, a tag is just a copy:

svn copy trunk tags/BLAH

When people say SVN doesn't really copy anything, they mean that the repository doesn't need to duplicate the data. It uses something akin to symbolic links to keep track of the copies.