13. A computer system for mapping a taxonomy to at least one other taxonomy, wherein the computer system comprises a non-transitory computer readable storage medium having computer executable instructions recorded thereon which cause a computer system to carry out a method, the taxonomies including concepts for organizing information, the computer system comprising: means for mapping a first set of concept nodes in a first taxonomy to a second set of concepts in a second taxonomy by aligning nodes with equivalent concepts in the first taxonomy and second taxonomy to generate a master taxonomy having a plurality of mapped concept nodes, the first set of concept nodes for organizing a first plurality of documents and the second set of concept nodes for organizing a second plurality of documents, each of the first and second plurality of documents associated with a document gloss, each of the mapped concept nodes containing documents from a concept node from the first taxonomy and a concept node from the second taxonomy that are determined to contain equivalent categories of documents; after mapping the first set of concept nodes to the second set of concept nodes, a concept finding module to find an expanded concept that is instantiated disproportionately in the document glosses of an unmapped node of the first taxonomy; a test module to determine if the expanded concept is instantiated in documents not classified at a leaf node in the second taxonomy; and a node creation module to create a new node with the expanded concept in the master taxonomy and place documents from the unmapped node and documents associated with the expanded concept under the new node if the expanded concept from the second taxonomy not classified at any leaf node is instantiated in documents not classified at a leaf node in the second taxonomy.
13. A computer system for mapping a taxonomy to at least one other taxonomy, wherein the computer system comprises a non-transitory computer readable storage medium having computer executable instructions recorded thereon which cause a computer system to carry out a method, the taxonomies including concepts for organizing information, the computer system comprising: means for mapping a first set of concept nodes in a first taxonomy to a second set of concepts in a second taxonomy by aligning nodes with equivalent concepts in the first taxonomy and second taxonomy to generate a master taxonomy having a plurality of mapped concept nodes, the first set of concept nodes for organizing a first plurality of documents and the second set of concept nodes for organizing a second plurality of documents, each of the first and second plurality of documents associated with a document gloss, each of the mapped concept nodes containing documents from a concept node from the first taxonomy and a concept node from the second taxonomy that are determined to contain equivalent categories of documents; after mapping the first set of concept nodes to the second set of concept nodes, a concept finding module to find an expanded concept that is instantiated disproportionately in the document glosses of an unmapped node of the first taxonomy; a test module to determine if the expanded concept is instantiated in documents not classified at a leaf node in the second taxonomy; and a node creation module to create a new node with the expanded concept in the master taxonomy and place documents from the unmapped node and documents associated with the expanded concept under the new node if the expanded concept from the second taxonomy not classified at any leaf node is instantiated in documents not classified at a leaf node in the second taxonomy. 15. The system of claim 13 wherein the nodes are categories of the first and second plurality of documents.