1. A method for assigning computerized records into a predetermined hierarchy of predetermined categories, comprising the following steps: (a) at a parent node in said hierarchy, automatically selecting which one of at least two classifiers available for use at that parent node will be used to assign records to categories within the parent node's subtree; and (b) at a descendant node of said parent node, automatically selecting which one of at least two subclassifiers available for use at that descendant node will be used to assign records to subcategories within the descendant node's subtree; wherein if a predetermined one of said classifiers is selected for said parent node, then a predetermined associated one of said subclassifiers will not be selected at said descendant node.