4. A computer-implemented method, comprising: generating a set of seed rules comprising: one or more rules resulting from one or more previously performed machine learning operations, and one or more randomly or pseudo-randomly generated rules; performing one or more machine learning operations on the set of seed rules to generate a new set of rules for determining whether a given pair of information items have a specific relationship, wherein: said performing the one or more machine learning operations on the set of seed rules is performed in regard to a set of information items including one or more differences from another set of information items used in said generating the set of seed rules, or the specific relationship is different than another specific relationship for which the set of seed rules was generated; and applying the new set of rules to one or more pairs of information items to identify at least one pair of information items as having the specific relationship.
4. A computer-implemented method, comprising: generating a set of seed rules comprising: one or more rules resulting from one or more previously performed machine learning operations, and one or more randomly or pseudo-randomly generated rules; performing one or more machine learning operations on the set of seed rules to generate a new set of rules for determining whether a given pair of information items have a specific relationship, wherein: said performing the one or more machine learning operations on the set of seed rules is performed in regard to a set of information items including one or more differences from another set of information items used in said generating the set of seed rules, or the specific relationship is different than another specific relationship for which the set of seed rules was generated; and applying the new set of rules to one or more pairs of information items to identify at least one pair of information items as having the specific relationship. 5. The computer-implemented method of claim 4 , wherein the specific relationship between the information items of the at least one pair includes one or more of: a relationship indicating the information items of the at least one pair are duplicates, wherein duplicate information items describe a common item; a relationship indicating the information items of the at least one pair are related but not duplicates; a relationship indicating the information items of the at least one pair are unrelated items; or a relationship indicating the information items of the at least one pair are members of a common title set, the title set including different products conveying a common work of art.