Abstract: A method for dynamically obtaining a unified classification information graph which provides a navigation system for a user to access sought information. The method includes providing multiple information resources that include a hierarchy of categories that are associated, each, with a category. Leaf categories in the hierarchy are connected to information pages. The method further provides generating a unified classification information graph by using the hierarchy of categories and the categories of the multiple information resources. The unified classification graph includes a hierarchy of unified categories. Leaf unified categories in the hierarchy are connected to information pages, whereby, information pages accessible through the hierarchy of the multiple information resources are also accessible through the hierarchy of the unified classification information graph.