Idf was released as "term specificity" by Karen Spärck Jones in the 1972 paper. Even though it has labored properly to be a heuristic, its theoretical foundations happen to be troublesome for at least 3 a long time afterward, with many researchers looking to uncover facts theoretic justifications for it.[seven] https://dallasfijif.ttblogs.com/17820753/trade-finance-legal-framework-options