// Contact <francois.fleuret@idiap.ch> for comments & bug reports //
///////////////////////////////////////////////////////////////////////////
+/*
+
+ A PiFeatureFamily is simply a set of pi-features, with a method to
+ extract a subfamily, so that we can forget all the features not used
+ by a classifier when the learning is over.
+
+ */
+
#ifndef PI_FEATURE_FAMILY_H
#define PI_FEATURE_FAMILY_H