When to use namespaces

Hi everyone, I'm doing a small hobby project to better my understanding of php5, specifically php5.3 and I'm wondering when a namespaced project is better and when it is better to simply use a prefix to all class names. I've been trying to get a feeling for what is considered the best practice, but most of the pages dealing with namespaces start with the assumption that you are building a complex application with lots of modules and say things like: Namespaces should be all lowercase and must follow the following conention: <vendor>\<package_name>\ (thats from the php.standards mailing list btw) In my case the project is a single module, single php file, with about 6 classes. It is an OO wrapper for PHP's xmlrpc methods (client and server) and meant to be used in a number of different projects. Is it considered a good idea to use a namespace in such a case? And if so, what should that be? I've named the project 'ripcord', and used that as a namespace as well. I could probably name it 'muze.ripcord', but somehow that feels less 'open' to me. Thanks in advance for any thoughts, Auke van Slooten Muze (www.muze.nl) PS. The project is at http://code.google.com/p/ripcord/, the PHP5.3 version is at http://code.google.com/p/ripcord/source/browse/#svn/branches/php5.3