3. The method of claim 1 wherein the content item N is a document, a sub-document, a collection of documents, a collection of sub-documents, a database record, a database object, a collection of database records, or a collection of database objects; and wherein database records or objects are drawn from one or more databases or one or more database views.
3. The method of claim 1 wherein the content item N is a document, a sub-document, a collection of documents, a collection of sub-documents, a database record, a database object, a collection of database records, or a collection of database objects; and wherein database records or objects are drawn from one or more databases or one or more database views. 4. The method of claim 3 , wherein N is one of a plurality of pre-terminal nodes N 1 , . . . , N n of C; wherein determining further comprises determining topical relevance of each of the other pre-terminal nodes N 1 , . . . , N n to the concept; and the method further comprises obtaining a content hierarchy C 1 from C by assigning a content item N n+1 to some N j , 1≤j≤n, such that the topical relevance of N j to the concept is greater than or equal to the topical relevance to the concept of the other N i , 1≤i≤n.