Working with Multiple SVN Repositories

At work, I've got 2 source code repos (repositories) to work with - one that is common to all the projects in the firm, and the other that is project specific.

Normally, that would mean I have to use 2 different repos, but instead we've got external references from our project-specific repo to the common repo so whenever I fetch the latest revision from the project-specific repo, the common repo is retrieved as a sub-folder.

To create the external reference, I defined the "svn:externals" property and used the value format " ".