6. The method of claim 1 , wherein promoting the plurality of value-item elements from the rearranged set of value-item lists into a tree structure further comprises evaluating a level of significance for a promotion hypothesis.
6. The method of claim 1 , wherein promoting the plurality of value-item elements from the rearranged set of value-item lists into a tree structure further comprises evaluating a level of significance for a promotion hypothesis. 7. The method of claim 6 , wherein the level of significance is adjusted in Bonferroni-style, and wherein the level of significance α obeys α ⁡ ( D ) = 1 - 0.95 2 1 ( D - 1 ) , with D a depth in the inferred hierarchical data structure.