[cols="1a,1a"]
|====
| Variable   | Description   
| **source_variable_1** +
`string` `standard` `mandatory`            | The first source variable. +
**Default**: val1               
| **source_variable_2** +
`string` `standard` `mandatory`            | The second source variable. +
**Default**: val2               
| **my_variable** +
`choice` `standard` `mandatory`            | A variable. +
**Choices**: 

* the value of the variable "source_variable_1"
* the value of the variable "source_variable_2"

**Default**: val1               
|====