26. The computer-implemented method of claim 25 , wherein each of the search definitions is formulated to include a constraint set that is unique, and wherein the constraints of the constraint set are selected from a group including a keyword constraint, a category constraint, a search parameter constraint, and an attribute constraint.
26. The computer-implemented method of claim 25 , wherein each of the search definitions is formulated to include a constraint set that is unique, and wherein the constraints of the constraint set are selected from a group including a keyword constraint, a category constraint, a search parameter constraint, and an attribute constraint. 35. The computer implemented method of claim 26 , including determining whether a constraint set associated with an excluded constraint corresponds to a count of data items that equals a count of data items associated with a constraint set without an excluded constraint, and if so, not displaying the search definition associated with the excluded constraint.