Module Interfaces.Sigs.Eval.Spec

module Spec: Interfaces.Specs.Eval 
Specification of covariance function

module Kernel: Interfaces.Specs.Kernel 
Kernel used for evaluation
module Inducing: sig .. end
Signature for evaluating inducing inputs
module Input: sig .. end
Signature for evaluating single inputs
module Inputs: sig .. end
Signature for evaluating multiple inputs