BASIC STRUCTURES FOR THESAURAL SYSTEMS

The history of post‐co‐ordinate indexing is one of trial and error in the face of poor results … Most thesauri seem very arbitrary in word selection and the extent of classification is equally arbitrary. FARRADANE The lack of semantic understanding, not even of a highly sophisticated level, by many other‐wise thoughtful workers in information retrieval is distressing… It may be hoped that the somewhat mystical aura which has been spread around the use of thesauri in literature searching, whether on purpose or by misunderstandings, will be dispersed in order to make room for a sober and down‐to‐earth discussion of the issue. BAR‐HILLEL