This is the last active development release of this package as Keystone 5 is now in a 6 to 12 month active maintenance phase. For more information please read our Keystone 5 and beyond post.
This package is an internal helper package used by Keystone to parse and validate access control expressions.
You should probably not use this directly in your Keystone projects.
For more information on how to configure access control for you Keystone application, please consult the Access Control Guide.