Type hierarchy

The type hierarchy is implemented in "src/types.jl".

AbstractSem: the most abstract type in our package

• AbstractSemSingle{O, I, L} <: AbstractSem is an abstract parametric type that is a supertype of all single models
  • Sem: models that do not need automatic differentiation or finite difference approximation
  • SemFiniteDiff: models whose gradients and/or hessians should be computed via finite difference approximation
• AbstractSemCollection <: AbstractSem is an abstract supertype of all models that contain multiple AbstractSem submodels

Every AbstractSemSingle has to have SemObserved, SemImplied, and SemLoss fields (and can have additional fields).

SemLoss is a container for multiple SemLossFunctions.