Idf was launched as "time period specificity" by Karen Spärck Jones within a 1972 paper. Although it has labored perfectly as a heuristic, its theoretical foundations have already been troublesome for a minimum of 3 decades afterward, with a lot of scientists attempting to find data theoretic justifications for it.[seven] https://ziondgfeb.wizzardsblog.com/37987550/5-simple-statements-about-supply-chain-finance-for-manufacturers-explained