Description:

The Zend\Permissions\Acl component provides a lightweight and flexible
access control list (ACL) implementation for privileges management. In
general, an application may utilize such ACL's to control access to
certain protected objects by other requesting objects.

For the purposes of this documentation:

- a resource is an object to which access is controlled.
- a role is an object that may request access to a Resource.

Put simply, roles request access to resources. For example, if a
parking attendant requests access to a car, then the parking attendant
is the requesting role, and the car is the resource, since access to
the car may not be granted to everyone.

Through the specification and use of an ACL, an application may
control how roles are granted access to resources.