9. The method of claim 8 , wherein the first Boolean property is disjunctive, and wherein (b)(i) comprises accepting a plurality of ItemSelectors belonging to the first group of ItemSelectors.
9. The method of claim 8 , wherein the first Boolean property is disjunctive, and wherein (b)(i) comprises accepting a plurality of ItemSelectors belonging to the first group of ItemSelectors. 10. The method of claim 9 , wherein (c) comprises: i) disjunctively joining the plurality of chosen ItemSelectors that belong to the first group within a parenthetical expression, and ii) conjunctively joining the parenthetical expression to a Boolean expression containing the second ItemSelector.