[cols="1a,1a"]
|====
| 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               
|====