specification/variables/system.md
# System Variables
In addition to the standard scopes, there is a special `system` scope. This scope is a utility to make miscellaneous information accessible to an instance. The following special variables exist in the system scope:
| Key | Description |
| --- | --- |
| instance | Returns the instance ID of the running instance. |
| uuid | Returns a randomly generated UUID. |
| epoch | Returns the current time in unix/epoch format. |