2. A computer-implemented method for classifying content, comprising: (A) receiving, at a processor and as part of performing a query, search results including both structured and unstructured content; (B) providing a taxonomy having an entire set of preexisting facets associated with different subject categories; (C) using, by the processor, a structured classifier to classify the structured content with one or more particular preexisting facets in the taxonomy; (D) using, by the processor, a different unstructured classifier to classify the unstructured content with at least one of the particular preexisting facets; (E) displaying, in response to the query, those ones of the particular preexisting facets that are classified with both the structured content and the unstructured content; (F) associating an ontology with the structured and unstructured content that includes at least one concept having different categories and sub-categories; (G) inserting a portion of the ontology into the taxonomy; (H) using ones of the subject categories that correspond to the inserted portion of the ontology as facets for classifying the structured and unstructured content; (I) comparing data items contained in the search results to the ontology; (J) identifying a particular concept of the ontology according to the comparison; (K) dynamically and automatically creating a new facet in the taxonomy according to the identified concept, the new facet being different than the preexisting facets of the set; and (L) using the new facet along with the preexisting facets of the set to classify both the structured and unstructured content.
2. A computer-implemented method for classifying content, comprising: (A) receiving, at a processor and as part of performing a query, search results including both structured and unstructured content; (B) providing a taxonomy having an entire set of preexisting facets associated with different subject categories; (C) using, by the processor, a structured classifier to classify the structured content with one or more particular preexisting facets in the taxonomy; (D) using, by the processor, a different unstructured classifier to classify the unstructured content with at least one of the particular preexisting facets; (E) displaying, in response to the query, those ones of the particular preexisting facets that are classified with both the structured content and the unstructured content; (F) associating an ontology with the structured and unstructured content that includes at least one concept having different categories and sub-categories; (G) inserting a portion of the ontology into the taxonomy; (H) using ones of the subject categories that correspond to the inserted portion of the ontology as facets for classifying the structured and unstructured content; (I) comparing data items contained in the search results to the ontology; (J) identifying a particular concept of the ontology according to the comparison; (K) dynamically and automatically creating a new facet in the taxonomy according to the identified concept, the new facet being different than the preexisting facets of the set; and (L) using the new facet along with the preexisting facets of the set to classify both the structured and unstructured content. 4. The computer-implemented method of claim 2 , further comprising: building new classifiers for the facets created from the inserted portion of the ontology; and using the new classifiers to classify the structured and unstructured content with the facets created from the inserted portion of the ontology.