ISR10 The Indexing Function chapter Joseph John Rocchio Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 2-10 I Word Stem Relative Type Frequency C i term . 53i document .28 request .20 index .11 proĢile .11 association .098 generation .086 number .069 related * 045 information .045 collection .045 system .041 relevance .037 expanded .037 thin .033 Word Stem Frequency List of a Sample Document Table 2.1 ū The document[OCRerr] characterized is reference 12.