17. The computer system of claim 1 comprising a facet analysis component for defining the faceted data set for sharing among a plurality of domains of information, said facet analysis component configured to receive input information and discover the facets, facet attributes, and facet attribute hierarchies of the input information, said input information comprising at least one of information of any of the domains to be classified and feedback from respective domain concept taxonomy information.
17. The computer system of claim 1 comprising a facet analysis component for defining the faceted data set for sharing among a plurality of domains of information, said facet analysis component configured to receive input information and discover the facets, facet attributes, and facet attribute hierarchies of the input information, said input information comprising at least one of information of any of the domains to be classified and feedback from respective domain concept taxonomy information. 19. The computer system of claim 17 comprising: (a) a first computer system including the facet analysis component for defining the shared faceted data set, said facet analysis component further defining from the shared faceted data set a domain-specific faceted data set for a domain to be classified; and (b) a second computer system including a classification synthesis component for building the dimensional concept taxonomies for one or more domains, said synthesis component defining the concept definitions and expressing the dimensional concept relationships between the concepts for each of the one or more domains to be classified in accordance with the respective domain-specific faceted data set.