|docid||Any||Document identifier of document d.|
|tf||DOUBLE PRECISION||Term frequency of term t in document d, calculated as specified by Formula argument.|
|idf||DOUBLE PRECISION||Inverse document frequency of term t in document d, calculated by this formula:
IDF(t) = log (doccount / doccount (t))
where doccount is the number of documents in the document set and doccount (t) is the number of documents that contain the term t.
|tf_idf||DOUBLE PRECISION||TFIDF score of term t in document d, calculated by this formula:
TFIDF(t, d) = TF(t, d) * IDF(t)