Here is a list of web BPMN diagram elements with Automation properties.
Element Name
Visual
Comments
Pool
At least one Pool is required. Multiple Pools are allowed in the diagram, but message flow is not automated between Pools.
Lane
It's good practice to assign a user or group to the Lane. By default, tasks within a Lane are performed by the group or user assigned to it.
Selected "Task" Shapes
The "Generic Task", "Manual Task", "Automatic Task", "Automated Service Task" and "User Task" can all perform automation tasks and events.
The "Send Task" and "Script Task" are special – see descriptions below.
Event
The first Event is the "Start" Event and requires Owner, Starter, and Deployer definitions. The last Event in a flow can have "end complete process" selected to cancel other parallel flows.
Send Task
Sends automation emails.
Script Task
Performs automation events only and no tasks.
Signal
Indicates a timer wait and can perform Events. The shape text can indicate the duration of the wait, but a timer is not initiated by a Signal shape.
Exclusive Gateway
Branches the automation flow. Parallel gateways also branch the automation flow, but there are no automation properties on parallel gateways.