There are three type of panels, every panel has its own set of a umber of models
how can a model be selected that is part of selected panel models?
'paneltypes': collection ['paneltype'] {
'paneltype': text
}
'modeltypes': collection ['modeltype'] {
'modetype': text
'paneltype': text
}
'projecten': collection ['project'] {
'project': text
'panel': text -> ^ .'paneltypes'[]
'model': text -> ^ .'modeltypes'[]
}