Idf was released as "expression specificity" by Karen Spärck Jones within a 1972 paper. Even though it has worked properly being a heuristic, its theoretical foundations are troublesome for at least a few decades afterward, with a lot of scientists looking to come across information theoretic justifications for it.[seven] O5: https://-reversefactoring20628.thezenweb.com/5-simple-statements-about-supply-chain-finance-for-manufacturers-explained-76285556