The CONSTRUCTION OF A THESAURUS Available to Purchase

Our first attempt at co‐ordinate indexing was the analysis of proprietary building systems, but the results were so encouraging that we decided to apply the method to the much wider problems of technical literature. The decision to use co‐ordinate indexing for this literature was not quite so clear‐cut, as general and special classifications for building already exist and are being used, with varying degrees of success, for retrieving technical information. We have had some experience in the use of these classifications and have rejected them for our purpose for a number of reasons: