Sometimes there are things that are linked to a variety of subjects, like relationship that are linked to objects or object_parts or contracts.
Now I have a subject in which I want to use a relationship, but sometimes I would like to add a relationship that is linked to an object and sometimes I want to add a relationship that is linked to a contract. I thought I might use a variant that uses a lookup for relationship for objects in one instant and a lookup for relationships for contracts in the other instant. However the lookup of a variant cannot change and is always the same as was specified in the default.
I would like to be able to assign a different lookup table to a variant.