Idf was introduced as "phrase specificity" by Karen Spärck Jones inside of a 1972 paper. Even though it has labored well as being a heuristic, its theoretical foundations are already troublesome for a minimum of a few decades afterward, with many scientists looking to obtain info theoretic justifications for it.[7] https://riverhijhg.blogdosaga.com/37889199/supply-chain-financing-structures-secrets