Idf was launched as "expression specificity" by Karen Spärck Jones inside of a 1972 paper. Although it has worked properly like a heuristic, its theoretical foundations are already troublesome for at least a few a long time afterward, with lots of researchers attempting to obtain data theoretic justifications for it.[7] https://payment-guarantees41728.anchor-blog.com/18347931/supply-chain-finance-transparency-tools-no-further-a-mystery