If Type is set to Variant,
this field contains the relation to the VarDim Variant Option
table connected to the VarDim Type.
By creation of a new VarDim Variant, a new relation will automatically
be created but it can be overwritten manually. This could for instance be relevant if the
same table relation has to be used for multiple VarDim Types. Instead of
creating multiple table relations with identical outcomes, the initially created table
relation can be connected to multiple VarDim Types.
Be aware that a change of a VarDim Variant Option will accomplish the same
change to all VarDim Types related to the VarDim Variant.