Analysis of current methods for achieving compatibility or convertibility between two or more indexing languages draws attention to the need for a switching language to establish equivalency between concepts, not terms. In order to examine the assumption of the conceptual equivalency of identical terms in the indexing languages of related subject…

This first of five course installments on providing subject access to information focuses on three perceptions of subject access: the system analyst's view, the user-oriented view, and a consolidation. Definitions of subject access and related terms and subject access in an online environment are included. Five references are listed. (EJS)