title: MiniZinc - Array of (multidimensional) array
body: <p>I would like to know if it’s possible to have array of (multidimensional) array in MiniZinc language.</p>
  
  <p>Indeed, I would like to resolve a timetabling problem with workers. My goal is to check if they are available at least 1 day per week. Each worker is indexed by an integer and I have their schedule per week. </p>
  
  <p>For me, an array like : <code>[[number_of_week, weekday]]</code> could be a solution.</p>
  
  <p>For example, worker 1 who is available monday/friday in week 1 and tuesday/thursday in week 2 can be modeled by the following array : (« 1 » means that the worker is available)</p>
  
  <p><code>[[| 1,0,0,0,1,
     | 0,1,0,1,0 |],
    [...], ...]</code></p>
  
  <p>If it's possible, how to declare this kind of array ? And I’m also open to any advice on modeling this constraint.</p>
  
  <p>Sorry for my imperfect English and thank you in advance,
  Nicolas.</p>