You can search for identifiers within the package.
in-package search v0.2.0
val tau : [ `Default | `High | `Low | `Manual of float ]
val epsilon : [ `Default | `Manual of float ]
val max_volatility_iterations : [ `Default | `Manual of int ]
val default_rating : [ `Default | `Manual of int ]
val default_deviation : [ `Default | `Manual of int ]
val default_volatility : [ `Default | `Manual of float ]