Creating a subversion checkout/ dev target for easy_install

I was a little confused by setuptool's explanation of how to make an egg installable as

easy_install yourproject==dev

How do you tell it where your repository is? You actually have to put a URL somewhere for setuptools to find. I.E. In the long_description, the body of the page that your url loads, or perhaps elsewhere that looks like this:

In other words, a URL to the repository containing a fragment in the correct format.