This is part of the RATS Atomic Composite visual language.
-+- API
|
.---+-----.
| TE: TE |
+---------+
| AK: LAK |
'---------'
Or
-+- API
|
.---+-----.
| TE: <> | .---------------.
+---------+----->| <> |
| AK: LAK | '-+-----------+-'
'---------' | |
.--+------. .--+-------.
| TE: VGA | | TE: SCSI |
+---------+ +----------+
| AK: <> | | AK: <> |
'---------' '----------'
