Hi, to whom it may concern:

I'm wondering some times, without prior knowledge of a classifier,
but only with its type, like CvDTree, [[CvDTree]], but we can still load it, right?

After loading the classifier from an XML file,
we may know all the information of the classifier already.
But, there should be some interfaces to obtain some basic information about this classifier, including:

number of classes
number of features
considering outliers or not
etc.

That's only my suggestion. Hope you can take it into your consideration in later versions.

Best Regards
JIA