version: '0.10'
variables:
- variable:
    name: var1
    multi: 'True'
    value:
    - text: 'no'
    - text: 'yes'
    - text: maybe
- variable:
    name: var2
    multi: 'True'
constraints:
- fill:
  - name: calc_value
    param:
    - type: variable
      text: var1
    target:
    - text: var2