48. The computer program product of claim 43 wherein the instructions and data configure the system to provide a classification synthesis component for building dimensional concept taxonomies, said synthesis component defining the concept definitions and expressing the dimensional concept relationships between the concepts for the domain to be classified in accordance with the faceted data set.
49. The computer program product of claim 48 wherein the classification synthesis component relates two concept definitions in a dimensional concept relationship, on a dimensional axis, only if all of the facet attributes of a one concept definition are related to all or a subset of facet attributes of another concept definition.