Describes a method for automatically segmenting words into their stems and affixes using certain statistical properties of a corpus to indicate where words should be divided. (Author/PF)

Describes the use of machine aided indexing as part of NASA's information systems. The discussion covers reasons for incorporating machine aided indexing, the lexical dictionary used, subject switching, natural language processing, benefits to the system, and possible future developments. (CLB)

The role of formal, controlled vocabularies for indexing and retrieval is contrasted with the use of natural language for these activities. The following credo is advanced for large central information processors as appropriate to the 1970's (1) Highly structured controlled vocabularies are obsolete for indexing and retrieval; (2) The natural…

Describes the National Aeronautics and Space Administration (NASA) Lexical Dictionary (NLD), a machine-aided indexing system used online at the NASA Center for AeroSpace Information (CASI). The functions of NLD system components are described in detail, and production and quality benefits resulting from machine-aided indexing at CASI are…

This paper argues that as the number of concordance lines presented to researchers increases in line with ever-growing corpus size, the automatic selection of the most central lines will become more important. A method will be presented for selecting the most representative members from a set of concordance lines on the basis of repeated lexical…

The four chapters included in this report are based on LINCS project activities undertaken since 1968, with an emphasis on indexing tools in the language sciences and related problems. Chapter one, "Indexing Tools for the Language Sciences: Methodology," discusses the development of a LINCS thesaurus and its role in the LINCS network.…