12. The software product of claim 11, wherein said mechanism for attributing attribute relevance values provide attribute relevance values from the group consisting of strong relevant, weakly relevant and irrelevant.
11. The software product of claim 6, including a mechanism for displaying as a node focus the highest level node in the node hierarchy that a user chooses as start point of for exploration; a mechanism for displaying to the user the attribute relevance values for the node focus and allowing the user to select at least one of the attributes based on its attribute relevance value; and a mechanism for selecting a new node focus based on the at least one of the attributes selected by the user.