This is the documentation for the cfRegex project. There's a second menu above containing drop-down sub-menus, the first three of these sub-menus contain the pages specific to cfRegex, whilst the last two cover general regex topics.
These is no enforced order to this documentation, so feel free to jump around reading pages in whatever way you find comfortable, however if you're not experienced with regex then the Regex Features section is a good starting point - particularly since it will help the examples used in the rest of the documentation make sense.
If you know regex already, you may want to simply start with reading through how to use the cfregex tag and create objects with cfRegex, before moving on to the Actions and Features sections to learn what functionality is available - however don't skip the other sections entirely, as they still contain a few things even frequent regex users do not know!
All of this documentation is a work in progress - and, whilst it is hoped to be useful in its current state, it is not yet considered completed. Please bear this in mind whilst using it, but at the same time do not be afraid to give feedback on how it could be improved.