| http://www.w3.org/ns/prov#value | - w s(J)=??t???T{circumflex over ( )}J???t w(t)*(??j???J(w(j)+k)), where w(t) is the weight of a transaction t, w(j) is the weight of an item j, k is a constant, where j ranges over each item contained in a transaction t, and T is defined as a set of t transactions.
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