16. A computer-readable recording medium storing a program which causes a computer to execute the steps of: defining, in a computer, a plurality of different hierarchical relationships of terms describing an organizational framework for information; selecting, in a user interface, a level within each of at least two of the different hierarchical relationships; constructing, in a search query generator responsive to the selection of the level within each of the at least two different hierarchical relationships, individual search queries of terms that are based upon the selected levels, and combining the individual search queries of terms to form a search query that is provided to a search engine; searching, by the search engine, a source of information to locate documents which correspond to the search query; and displaying, on a display, information about the located documents to the user.
16. A computer-readable recording medium storing a program which causes a computer to execute the steps of: defining, in a computer, a plurality of different hierarchical relationships of terms describing an organizational framework for information; selecting, in a user interface, a level within each of at least two of the different hierarchical relationships; constructing, in a search query generator responsive to the selection of the level within each of the at least two different hierarchical relationships, individual search queries of terms that are based upon the selected levels, and combining the individual search queries of terms to form a search query that is provided to a search engine; searching, by the search engine, a source of information to locate documents which correspond to the search query; and displaying, on a display, information about the located documents to the user. 19. The computer-readable recording medium of claim 16 , wherein the user interface permits the user to select one or more sources of information to be searched.