Configuring Start Revision based on date — For Subversion repositories Fisheye has the ability to configure a Start Revision parameter to allow you to only index content from a given point in your repository.
Why do I need to describe the branch and tag structure for Subversion repositories? — In Subversion, branches and tags are defined by convention, based on their path within a repository, and not directly defined by the repository. A few different layout alternatives are commonly used. It is also possible that you are using your own custom layout. As a result you need to describe to FishEye which paths in your repository are used as branches and tags.