First version of the variant manager should create a full copy of the master page (parent page).

Mixin definition has to be done too:

Properties:

• mgnl:variationOf: single-valued reference to parent (mandatory)
• mgnl:assignedSegments: multi-valued String
  Subnode:
• mgnl:constraintSet: sub node of constraint set

Ideally, we need to ensure that only one of mgnl:assignedSegments or mgnl:constraintSet is defined, but I don't think that one can enforce that sort of rule in a nodetype/mixin definition (TBV)