The basic building block of command execution within the product takes place within an action. From actions, sends (PUT) and receives (GET) are executed.
Actions are either mailbox-based, host-based, or not tied to any mailbox or host. Mailbox-based actions are the most common and are referred to as actions (or Action). Host-based actions are referred to as host actions. Both mailbox- and host-based actions are organized within the hierarchical structure of a host (see Tree Structure).
Actions not tied to any mailbox or host are referred to as standalone actions.
In this documentation, the term action, when used by itself, is considered a general reference to actions, host actions, or standalone actions, unless noted otherwise.