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Osinga, M.; Verrijn Stuart, A. A. – Journal of Chemical Documentation, 1973
Existing methods for coding chemical compounds are discussed and evaluated as to their suitability for documentation of chemical reactions, a new classification for chemical reactions is presented, and possibilities of automatic encoding are studied. (24 references) (Author)
Descriptors: Chemistry, Classification, Data Processing, Documentation

Sasamoto, Mitsuo; And Others – Journal of Chemical Documentation, 1973
Two systems, WLN and Ringcode, for retrieving structural information were analyzed qualitatively and evaluated for a series of chemical compounds. The studies ranged from specific to generic questions and also involved retrieval by fragments. Neither system was completely satisfactory for all types of searches. (6 references) (Author)
Descriptors: Chemical Nomenclature, Chemistry, Classification, Codification

Crowe, J. E.; And Others – Journal of Chemical Documentation, 1973
The techniques of search strategy design for substructure searches of the Wiswesser Line Notation (WLN) file are described in detail. The Index Chemicus Registry System'' was used. (13 references) (Author/SM)
Descriptors: Chemical Nomenclature, Classification, Data Processing, Information Dissemination