| Variable | Description |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **condition**
`string` `standard` `mandatory` | A condition.
**Default**: no |
| **var1**
`string` `standard` *`hidden`* | A first variable.
**Hidden**: calculation from an unknown variable |
| **var2**
`string` `standard` *`hidden`* | A second variable.
**Hidden**: calculation from an condition variable |