Idf was introduced as "time period specificity" by Karen Spärck Jones within a 1972 paper. Although it has labored effectively as being a heuristic, its theoretical foundations are troublesome for at least a few decades afterward, with quite a few researchers attempting to come across details theoretic justifications for it.[7] https://-paymentguarantees96396.blogdeazar.com/38284782/the-fact-about-predictive-analytics-that-no-one-is-suggesting