IRS13 Table of Contents table of contents Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. TABLE OF CONTENTS (continued) Page VIII. OAŁTOLA, R. T. AND MURRAY, D. M. "An Experiment in Automatic Thesaurus Construction" Ahstract VIII-' 1. Introduction VIII-' 2. The Construction Algorithm VIII-2 A) Clustering the Document Collection VIII-3 B) Formation of Initial Classes VIII-3 C) Formation of Merged Classes VIII-6 D) Formation of Final Classes VIII-9 3. Evaluation VIII-ll A) Evaluation of the Classes VIII-ll B) Retrieval Evaluation VIII-15 [OCRerr]. Analysis of Results VIII-17 A) Overlap VIII-22 B) Unique Concepts VIII-22 C) Homogeneous Concept Classes VIII-23 0) Dividing Weights VIII-2L# E) Cranfield Collection VIII-24 F) Comparison of Other Methods VIII-25 References VIII-26 IX. LESK, M. E. "Word-Word Associations in Document Retrieval Systeins" 1. Introduction IX-l 2. Method IX-1 3. Results . . . . e . IX-5 14. Retrieval Experiments IX-18 ix