On the Use of Taxonomies for Representing Case Features and Local Similarity Measures
Ralph Bergmann · 1998
For defining attribute types to be used in the case representation, taxonomies occur quite often. The symbolic values at any node of the taxonomy tree are used as attribute values in a case or a query. A taxonomy type represents a relationship between the symbols through their position within the taxonomy-tree which expresses knowledge about the similarity between the symbols. This paper analyzes several situations in which taxonomies are used in different ways and proposes a systematic way of specifying local similarity measures for taxonomy types. The proposed similarity measures have a clear semantics and are easy to compute at runtime. 1. Introduction In current academic and commercial CBR systems, cases are often represented in an object-oriented fashion. Cases are collections of objects, each of which is described by a set of attribute-value pairs. The structure of an object is described by an object class that defines the set of attributes together with a type (set of possibl...