This source code is from the book           Information Retrieval: Data Structures and Algorithms            Edited by William B. Frakes and Ricardo Baeza-Yates            Prentice-Hall, 1992 ISBN: 0-13-463837-9   Code to Accompany Chapter 8: Stemming Algorithms   Contributed by:      William B. Frakes      Virginia Tech   Comments can be sent to:        Prof. William Frakes        Department of Computer Science        Virginia Polytechnic Institute and State University        Northern Virginia Graduate Center        2990 Telestar Ct.        Falls Church, VA 22042        703-698-4712 fax 703-698-6062        frakes@sarvis.cs.vt.edu   The files in this directory contain code for implementing the Porter   stemming algorithm.  This directory should contain the following files:   makefile      Builds object code and test drivers   testfile      Text data for testing the stemmer   stem.c        Module containing the Porter stemmer   stem.h        Header for the stemmer module   stemmer.c     Stemmer test program   Detailed information about the implementation and how to use it can    be found in the Makefile and the various source code files.