A strong definition of aboutness and a theory of its role in information retrieval systems have not been developed. Such a definition and theory may be extracted from the work of T. A. van Dijk. This paper discusses some of the implications of van Dijk's work for bibliographic classification...

Undiscovered public knowledge is a relatively unstudied phenomenon, and the few extended examples that have been published are intradisciplinary. This paper presents the concept of ‘facet’ as an example of interdisciplinary undiscovered public knowledge. ‘Facets’ were central to the...