FI variantDerivations appear in some cases, while variants appear in others

[wdrav]

The current state of the code proportions all variableFeatures to have variants, missing out on the variantDerivation descriptor in some cases. When should these tags appear, as opposed to the simple variant?

[jakebeal]

The type of the link depends on the type of the object being linked:

• A variant links to a Component
• A variantDerivation links to a CombinatorialDerivation
• A variantCollection links to a Collection

There is a separate concern about optimizing degenerate CombinatorialDerivation objects into Collection or Component objects, but that's a post-processing step, not a first pass emission.

[wdrav]

Excellent, thank you for the clarification.