1. A computerized device comprising a processor programmed to provide a navigating interface system for navigating through search results returned by a search query on unstructured or semi-structured data source, the search results being dynamically and semantically organized into categories and attributes in real-time, the interface system comprising, at most: a first user-engageable control dynamically populated with the categories and the attributes semantically related to the search results; and a second user-engageable control dynamically populated with filter values related to one of the categories or the attributes populated in the first user-engageable control; wherein a scope of the search results is responsive to a selection, by a user, of one of the attributes or categories which populate the first user-engageable control, and to a selection, by the user, of one of the filter values which populate the second user-engageable control.