You can also have named parameters in your routes. This allows you to give your URI segments names which can then be accessed from within your actions.
Example :
return array(
'blog/:year/:month/:id' => 'blog/entry', // Routes /blog/2010/11/entry_name to /blog/entry
);
In the above example it would catch the following /blog/2010/11/entry_name. It would then route that request to your 'entry' action in your 'blog' controller. There, the named params will be available like this :
$this->param('year');
$this->param('month');
$this->param('id');
