The fourth of five phases of a study of planning and evaluating multitype library networks pulls together the results of the first three, which examined individually three previously used approaches--performance, organization, and attitude--to form a model. The fifth phase is currently testing the model on a national basis. (CDD)

Reviews meaning and theory of library collections and structure and enumerates ways that data on collections can be organized to reveal underlying global structure (links and connections between collections, parts of collections, and users of collections). Definitions of terms applying to eight models described in text are appended. (53…