12. The method of claim 1 , wherein the kernel includes first and second reference modules, wherein the first reference module is specific to a first information domain and includes concepts relevant to the first information domain, and wherein the second reference module is specific to a second information domain and includes concepts relevant to the second information domain.
15. The method of claim 12 , wherein the plurality of concepts based on which the identified group of one or more concepts are identified includes at least one concept of the first reference module and at least one concept of the second reference module that is not included in the first reference module.