KNOWLEDGE RESOURCE TOOLS FOR INFORMATION ACCESS.

This paper provides an overview of a research program to develop facilities for working with large document collections that provide more refined access to the information contained in these 'source' materials than is possible through current information retrieval procedures. The tools being used for this purpose are machine-readable dictionaries, encyclopedias, and related 'resources' that provide geographical, biographical, and other kinds of specialized knowledge. A major feature of the program is the exploitation of the reciprocal relationship between sources and resources. These interactions between texts and tools are intended to support experts who organize and use information in a workstation environment. Two systems under development are described to illustrate the approach: one providing capabilities for full-text subject assessment; the other for concept elaboration while reading text.